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1. Are the eigenvalues of preconditioned banded symmetric Toeplitz matrices known in almost closed form? Ahmad, Fayyazet al. PrimeFaces.cw("SelectBooleanButton","widget_formSmash_items_resultList_0_j_idt594",{id:"formSmash:items:resultList:0:j_idt594",widgetVar:"widget_formSmash_items_resultList_0_j_idt594",onLabel:"et al.",offLabel:"et al.",onIcon:"ui-icon-triangle-1-s",offIcon:"ui-icon-triangle-1-e"}); PrimeFaces.cw("Panel","testPanel",{id:"formSmash:items:resultList:0:orgPanel",widgetVar:"testPanel",toggleable:true,toggleSpeed:500,collapsed:false,toggleOrientation:"vertical",closable:true,closeSpeed:500}); Al-Aidarous, Eman S.Alrehaili, Dina A.Ekström, Sven-ErikUppsala University, Disciplinary Domain of Science and Technology, Mathematics and Computer Science, Department of Information Technology, Division of Scientific Computing. Uppsala University, Disciplinary Domain of Science and Technology, Mathematics and Computer Science, Department of Information Technology, Numerical Analysis.Furci, IsabellaSerra-Capizzano, StefanoUppsala University, Disciplinary Domain of Science and Technology, Mathematics and Computer Science, Department of Information Technology, Division of Scientific Computing. Uppsala University, Disciplinary Domain of Science and Technology, Mathematics and Computer Science, Department of Information Technology, Numerical Analysis.PrimeFaces.cw("Panel","testPanel",{id:"formSmash:items:resultList:0:etAlPanel",widgetVar:"testPanel",toggleable:true,toggleSpeed:500,collapsed:false,toggleOrientation:"vertical",closable:true,closeSpeed:500}); Are the eigenvalues of preconditioned banded symmetric Toeplitz matrices known in almost closed form?2018In: Numerical Algorithms, ISSN 1017-1398, E-ISSN 1572-9265, Vol. 78, p. 867-893Article in journal (Refereed)2. Are the eigenvalues of preconditioned banded symmetric Toeplitz matrices known in almost closed form? Ahmad, Fayyazet al. PrimeFaces.cw("SelectBooleanButton","widget_formSmash_items_resultList_1_j_idt594",{id:"formSmash:items:resultList:1:j_idt594",widgetVar:"widget_formSmash_items_resultList_1_j_idt594",onLabel:"et al.",offLabel:"et al.",onIcon:"ui-icon-triangle-1-s",offIcon:"ui-icon-triangle-1-e"}); PrimeFaces.cw("Panel","testPanel",{id:"formSmash:items:resultList:1:orgPanel",widgetVar:"testPanel",toggleable:true,toggleSpeed:500,collapsed:false,toggleOrientation:"vertical",closable:true,closeSpeed:500}); Al-Aidarous, Eman S.Alrehaili, Dina A.Ekström, Sven-ErikUppsala University, Disciplinary Domain of Science and Technology, Mathematics and Computer Science, Department of Information Technology, Division of Scientific Computing. Uppsala University, Disciplinary Domain of Science and Technology, Mathematics and Computer Science, Department of Information Technology, Numerical Analysis.Furci, IsabellaSerra-Capizzano, StefanoUppsala University, Disciplinary Domain of Science and Technology, Mathematics and Computer Science, Department of Information Technology, Division of Scientific Computing. Uppsala University, Disciplinary Domain of Science and Technology, Mathematics and Computer Science, Department of Information Technology, Numerical Analysis.PrimeFaces.cw("Panel","testPanel",{id:"formSmash:items:resultList:1:etAlPanel",widgetVar:"testPanel",toggleable:true,toggleSpeed:500,collapsed:false,toggleOrientation:"vertical",closable:true,closeSpeed:500}); Are the eigenvalues of preconditioned banded symmetric Toeplitz matrices known in almost closed form?2017Report (Other academic)3. A discontinuous Galerkin extension of the vertex-centered edge-based finite volume method Berggren, Martinet al. PrimeFaces.cw("SelectBooleanButton","widget_formSmash_items_resultList_2_j_idt594",{id:"formSmash:items:resultList:2:j_idt594",widgetVar:"widget_formSmash_items_resultList_2_j_idt594",onLabel:"et al.",offLabel:"et al.",onIcon:"ui-icon-triangle-1-s",offIcon:"ui-icon-triangle-1-e"}); PrimeFaces.cw("Panel","testPanel",{id:"formSmash:items:resultList:2:orgPanel",widgetVar:"testPanel",toggleable:true,toggleSpeed:500,collapsed:false,toggleOrientation:"vertical",closable:true,closeSpeed:500}); Ekström, Sven-ErikUppsala University, Disciplinary Domain of Science and Technology, Mathematics and Computer Science, Department of Information Technology, Division of Scientific Computing. Uppsala University, Disciplinary Domain of Science and Technology, Mathematics and Computer Science, Department of Information Technology, Numerical Analysis.Nordström, JanUppsala University, Disciplinary Domain of Science and Technology, Mathematics and Computer Science, Department of Information Technology, Division of Scientific Computing. Uppsala University, Disciplinary Domain of Science and Technology, Mathematics and Computer Science, Department of Information Technology, Numerical Analysis.PrimeFaces.cw("Panel","testPanel",{id:"formSmash:items:resultList:2:etAlPanel",widgetVar:"testPanel",toggleable:true,toggleSpeed:500,collapsed:false,toggleOrientation:"vertical",closable:true,closeSpeed:500}); A discontinuous Galerkin extension of the vertex-centered edge-based finite volume method2009In: Communications in Computational Physics, ISSN 1815-2406, E-ISSN 1991-7120, Vol. 5, p. 456-468Article in journal (Refereed)4. A vertex-centered discontinuous Galerkin method for flow problems Ekström, Sven-Erik PrimeFaces.cw("SelectBooleanButton","widget_formSmash_items_resultList_3_j_idt591",{id:"formSmash:items:resultList:3:j_idt591",widgetVar:"widget_formSmash_items_resultList_3_j_idt591",onLabel:"Ekström, Sven-Erik ",offLabel:"Ekström, Sven-Erik ",onIcon:"ui-icon-triangle-1-s",offIcon:"ui-icon-triangle-1-e"}); Uppsala University, Disciplinary Domain of Science and Technology, Mathematics and Computer Science, Department of Information Technology, Division of Scientific Computing. Uppsala University, Disciplinary Domain of Science and Technology, Mathematics and Computer Science, Department of Information Technology, Numerical Analysis.PrimeFaces.cw("Panel","testPanel",{id:"formSmash:items:resultList:3:orgPanel",widgetVar:"testPanel",toggleable:true,toggleSpeed:500,collapsed:false,toggleOrientation:"vertical",closable:true,closeSpeed:500}); PrimeFaces.cw("Panel","testPanel",{id:"formSmash:items:resultList:3:etAlPanel",widgetVar:"testPanel",toggleable:true,toggleSpeed:500,collapsed:false,toggleOrientation:"vertical",closable:true,closeSpeed:500}); A vertex-centered discontinuous Galerkin method for flow problems2016Licentiate thesis, comprehensive summary (Other academic)Abstract [en] PrimeFaces.cw("SelectBooleanButton","widget_formSmash_items_resultList_3_j_idt629_0_j_idt630",{id:"formSmash:items:resultList:3:j_idt629:0:j_idt630",widgetVar:"widget_formSmash_items_resultList_3_j_idt629_0_j_idt630",onLabel:"Abstract [en]",offLabel:"Abstract [en]",onIcon:"ui-icon-triangle-1-s",offIcon:"ui-icon-triangle-1-e"}); The understanding of flow problems, and finding their solution, has been important for most of human history, from the design of aqueducts to boats and airplanes. The use of physical miniature models and wind tunnels were, and still are, useful tools for design, but with the development of computers, an increasingly large part of the design process is assisted by computational fluid dynamics (CFD).

Many industrial CFD codes have their origins in the 1980s and 1990s, when the low order finite volume method (FVM) was prevalent. Discontinuous Galerkin methods (DGM) have, since the turn of the century, been seen as the successor of these methods, since it is potentially of arbitrarily high order. In its lowest order form DGM is equivalent to FVM. However, many existing codes are not compatible with standard DGM and would need a complete rewrite to obtain the advantages of the higher order.

This thesis shows how to extend existing vertex-centered and edge-based FVM codes to higher order, using a special kind of DGM discretization, which is different from the standard cell-centered type. Two model problems are examined to show the necessary data structures that need to be constructed, the order of accuracy for the method, and the use of an

*hp*-adaptation scheme to resolve a developing shock. Then the method is further developed to solve the steady Euler equations, within the existing industrial**Edge**code, using acceleration techniques such as local time stepping and multigrid.With the ever increasing need for more efficient and accurate solvers and algorithms in CFD, the modified DGM presented in this thesis could be used to help and accelerate the adoption of high order methods in industry.

PrimeFaces.cw("Panel","tryPanel",{id:"formSmash:items:resultList:3:j_idt629:0:abstractPanel",widgetVar:"tryPanel",toggleable:true,toggleSpeed:500,collapsed:false,toggleOrientation:"vertical",closable:true,closeSpeed:500}); List of papers PrimeFaces.cw("SelectBooleanButton","widget_formSmash_items_resultList_3_j_idt633",{id:"formSmash:items:resultList:3:j_idt633",widgetVar:"widget_formSmash_items_resultList_3_j_idt633",onLabel:"List of papers",offLabel:"List of papers",onIcon:"ui-icon-triangle-1-s",offIcon:"ui-icon-triangle-1-e"}); 1. A discontinuous Galerkin extension of the vertex-centered edge-based finite volume methodOpen this publication in new window or tab >>A discontinuous Galerkin extension of the vertex-centered edge-based finite volume method### Berggren, Martin

### Ekström, Sven-Erik

Uppsala University, Disciplinary Domain of Science and Technology, Mathematics and Computer Science, Department of Information Technology, Division of Scientific Computing. Uppsala University, Disciplinary Domain of Science and Technology, Mathematics and Computer Science, Department of Information Technology, Numerical Analysis.### Nordström, Jan

Uppsala University, Disciplinary Domain of Science and Technology, Mathematics and Computer Science, Department of Information Technology, Division of Scientific Computing. Uppsala University, Disciplinary Domain of Science and Technology, Mathematics and Computer Science, Department of Information Technology, Numerical Analysis.PrimeFaces.cw("AccordionPanel","widget_formSmash_items_resultList_3_j_idt634_0_overlay_some",{id:"formSmash:items:resultList:3:j_idt634:0:overlay:some",widgetVar:"widget_formSmash_items_resultList_3_j_idt634_0_overlay_some",multiple:true}); PrimeFaces.cw("AccordionPanel","widget_formSmash_items_resultList_3_j_idt634_0_overlay_otherAuthors",{id:"formSmash:items:resultList:3:j_idt634:0:overlay:otherAuthors",widgetVar:"widget_formSmash_items_resultList_3_j_idt634_0_overlay_otherAuthors",multiple:true}); 2009 (English)In: Communications in Computational Physics, ISSN 1815-2406, E-ISSN 1991-7120, Vol. 5, p. 456-468Article in journal (Refereed) Published##### National Category

Computational Mathematics Computer Sciences##### Identifiers

urn:nbn:se:uu:diva-17606 (URN)000263563600013 ()PrimeFaces.cw("AccordionPanel","widget_formSmash_items_resultList_3_j_idt634_0_overlay_j_idt809",{id:"formSmash:items:resultList:3:j_idt634:0:overlay:j_idt809",widgetVar:"widget_formSmash_items_resultList_3_j_idt634_0_overlay_j_idt809",multiple:true}); PrimeFaces.cw("AccordionPanel","widget_formSmash_items_resultList_3_j_idt634_0_overlay_j_idt815",{id:"formSmash:items:resultList:3:j_idt634:0:overlay:j_idt815",widgetVar:"widget_formSmash_items_resultList_3_j_idt634_0_overlay_j_idt815",multiple:true}); PrimeFaces.cw("AccordionPanel","widget_formSmash_items_resultList_3_j_idt634_0_overlay_j_idt821",{id:"formSmash:items:resultList:3:j_idt634:0:overlay:j_idt821",widgetVar:"widget_formSmash_items_resultList_3_j_idt634_0_overlay_j_idt821",multiple:true}); $(function(){PrimeFaces.cw("OverlayPanel","overlay45377",{id:"formSmash:items:resultList:3:j_idt634:0:j_idt638",widgetVar:"overlay45377",target:"formSmash:items:resultList:3:j_idt634:0:partsLink",showEvent:"mousedown",hideEvent:"mousedown",showEffect:"blind",hideEffect:"fade",appendToBody:true});}); 2. Incorporating a discontinuous Galerkin method into the existing vertex-centered edge-based finite volume solver EdgeOpen this publication in new window or tab >>Incorporating a discontinuous Galerkin method into the existing vertex-centered edge-based finite volume solver Edge### Ekström, Sven-Erik

### Berggren, Martin

PrimeFaces.cw("AccordionPanel","widget_formSmash_items_resultList_3_j_idt634_1_overlay_some",{id:"formSmash:items:resultList:3:j_idt634:1:overlay:some",widgetVar:"widget_formSmash_items_resultList_3_j_idt634_1_overlay_some",multiple:true}); PrimeFaces.cw("AccordionPanel","widget_formSmash_items_resultList_3_j_idt634_1_overlay_otherAuthors",{id:"formSmash:items:resultList:3:j_idt634:1:overlay:otherAuthors",widgetVar:"widget_formSmash_items_resultList_3_j_idt634_1_overlay_otherAuthors",multiple:true}); 2010 (English)In: ADIGMA — A European Initiative on the Development of Adaptive Higher-Order Variational Methods for Aerospace Applications, Berlin: Springer-Verlag , 2010, p. 39-52Chapter in book (Refereed)##### Place, publisher, year, edition, pages

Berlin: Springer-Verlag, 2010##### Series

Notes on Numerical Fluid Mechanics and Multidisciplinary Design ; 113##### National Category

Computational Mathematics Computer Sciences##### Identifiers

urn:nbn:se:uu:diva-134383 (URN)10.1007/978-3-642-03707-8_4 (DOI)PrimeFaces.cw("AccordionPanel","widget_formSmash_items_resultList_3_j_idt634_1_overlay_j_idt809",{id:"formSmash:items:resultList:3:j_idt634:1:overlay:j_idt809",widgetVar:"widget_formSmash_items_resultList_3_j_idt634_1_overlay_j_idt809",multiple:true}); PrimeFaces.cw("AccordionPanel","widget_formSmash_items_resultList_3_j_idt634_1_overlay_j_idt815",{id:"formSmash:items:resultList:3:j_idt634:1:overlay:j_idt815",widgetVar:"widget_formSmash_items_resultList_3_j_idt634_1_overlay_j_idt815",multiple:true}); PrimeFaces.cw("AccordionPanel","widget_formSmash_items_resultList_3_j_idt634_1_overlay_j_idt821",{id:"formSmash:items:resultList:3:j_idt634:1:overlay:j_idt821",widgetVar:"widget_formSmash_items_resultList_3_j_idt634_1_overlay_j_idt821",multiple:true}); $(function(){PrimeFaces.cw("OverlayPanel","overlay372258",{id:"formSmash:items:resultList:3:j_idt634:1:j_idt638",widgetVar:"overlay372258",target:"formSmash:items:resultList:3:j_idt634:1:partsLink",showEvent:"mousedown",hideEvent:"mousedown",showEffect:"blind",hideEffect:"fade",appendToBody:true});}); 3. Agglomeration multigrid for the vertex-centered dual discontinuous Galerkin methodOpen this publication in new window or tab >>Agglomeration multigrid for the vertex-centered dual discontinuous Galerkin method### Ekström, Sven-Erik

### Berggren, Martin

PrimeFaces.cw("AccordionPanel","widget_formSmash_items_resultList_3_j_idt634_2_overlay_some",{id:"formSmash:items:resultList:3:j_idt634:2:overlay:some",widgetVar:"widget_formSmash_items_resultList_3_j_idt634_2_overlay_some",multiple:true}); PrimeFaces.cw("AccordionPanel","widget_formSmash_items_resultList_3_j_idt634_2_overlay_otherAuthors",{id:"formSmash:items:resultList:3:j_idt634:2:overlay:otherAuthors",widgetVar:"widget_formSmash_items_resultList_3_j_idt634_2_overlay_otherAuthors",multiple:true}); 2010 (English)In: ADIGMA — A European Initiative on the Development of Adaptive Higher-Order Variational Methods for Aerospace Applications, Berlin: Springer-Verlag , 2010, p. 301-308Chapter in book (Refereed)##### Place, publisher, year, edition, pages

Berlin: Springer-Verlag, 2010##### Series

Notes on Numerical Fluid Mechanics and Multidisciplinary Design ; 113##### National Category

Computational Mathematics Computer Sciences##### Identifiers

urn:nbn:se:uu:diva-134384 (URN)10.1007/978-3-642-03707-8_21 (DOI)PrimeFaces.cw("AccordionPanel","widget_formSmash_items_resultList_3_j_idt634_2_overlay_j_idt809",{id:"formSmash:items:resultList:3:j_idt634:2:overlay:j_idt809",widgetVar:"widget_formSmash_items_resultList_3_j_idt634_2_overlay_j_idt809",multiple:true}); PrimeFaces.cw("AccordionPanel","widget_formSmash_items_resultList_3_j_idt634_2_overlay_j_idt815",{id:"formSmash:items:resultList:3:j_idt634:2:overlay:j_idt815",widgetVar:"widget_formSmash_items_resultList_3_j_idt634_2_overlay_j_idt815",multiple:true}); PrimeFaces.cw("AccordionPanel","widget_formSmash_items_resultList_3_j_idt634_2_overlay_j_idt821",{id:"formSmash:items:resultList:3:j_idt634:2:overlay:j_idt821",widgetVar:"widget_formSmash_items_resultList_3_j_idt634_2_overlay_j_idt821",multiple:true}); $(function(){PrimeFaces.cw("OverlayPanel","overlay372260",{id:"formSmash:items:resultList:3:j_idt634:2:j_idt638",widgetVar:"overlay372260",target:"formSmash:items:resultList:3:j_idt634:2:partsLink",showEvent:"mousedown",hideEvent:"mousedown",showEffect:"blind",hideEffect:"fade",appendToBody:true});}); PrimeFaces.cw("Panel","tryPanel",{id:"formSmash:items:resultList:3:partsPanel",widgetVar:"tryPanel",toggleable:true,toggleSpeed:500,collapsed:false,toggleOrientation:"vertical",closable:true,closeSpeed:500}); Download full text (pdf)fulltext$(function(){PrimeFaces.cw("Tooltip","widget_formSmash_items_resultList_3_j_idt854_0_j_idt857",{id:"formSmash:items:resultList:3:j_idt854:0:j_idt857",widgetVar:"widget_formSmash_items_resultList_3_j_idt854_0_j_idt857",showEffect:"fade",hideEffect:"fade",target:"formSmash:items:resultList:3:j_idt854:0:fullText"});}); 5. Matrix-Less Methods for Computing Eigenvalues of Large Structured Matrices Ekström, Sven-Erik PrimeFaces.cw("SelectBooleanButton","widget_formSmash_items_resultList_4_j_idt591",{id:"formSmash:items:resultList:4:j_idt591",widgetVar:"widget_formSmash_items_resultList_4_j_idt591",onLabel:"Ekström, Sven-Erik ",offLabel:"Ekström, Sven-Erik ",onIcon:"ui-icon-triangle-1-s",offIcon:"ui-icon-triangle-1-e"}); PrimeFaces.cw("Panel","testPanel",{id:"formSmash:items:resultList:4:orgPanel",widgetVar:"testPanel",toggleable:true,toggleSpeed:500,collapsed:false,toggleOrientation:"vertical",closable:true,closeSpeed:500}); PrimeFaces.cw("Panel","testPanel",{id:"formSmash:items:resultList:4:etAlPanel",widgetVar:"testPanel",toggleable:true,toggleSpeed:500,collapsed:false,toggleOrientation:"vertical",closable:true,closeSpeed:500}); Matrix-Less Methods for Computing Eigenvalues of Large Structured Matrices2018Doctoral thesis, comprehensive summary (Other academic)Abstract [en] PrimeFaces.cw("SelectBooleanButton","widget_formSmash_items_resultList_4_j_idt629_0_j_idt630",{id:"formSmash:items:resultList:4:j_idt629:0:j_idt630",widgetVar:"widget_formSmash_items_resultList_4_j_idt629_0_j_idt630",onLabel:"Abstract [en]",offLabel:"Abstract [en]",onIcon:"ui-icon-triangle-1-s",offIcon:"ui-icon-triangle-1-e"}); When modeling natural phenomena with linear partial differential equations, the discretized system of equations is in general represented by a matrix. To solve or analyze these systems, we are often interested in the spectral behavior of these matrices. Whenever the matrices of interest are Toeplitz, or Toeplitz-like, we can use the theory of Generalized Locally Toeplitz (GLT) sequences to study the spectrum (eigenvalues). A central concept in the theory of GLT sequences is the so-called symbol, that is, a function associated with a sequence of matrices of increasing size. When sampling the symbol and when the related matrix sequence is Hermitian (or quasi-Hermitian), we obtain an approximation of the spectrum of a matrix of a fixed size and we can therefore see its general behavior. However, the so-computed approximations of the eigenvalues are often affected by errors having magnitude of the reciprocal of the matrix size.

In this thesis we develop novel methods, which we call "matrix-less" since they neither store the matrices of interest nor depend on matrix-vector products, to estimate these errors. Moreover, we exploit the structures of the considered matrices to efficiently and accurately compute the spectrum.

We begin by considering the errors of the approximate eigenvalues computed by sampling the symbol on a uniform grid, and we conjecture the existence of an asymptotic expansion for these errors. We devise an algorithm to approximate the expansion by using a small number of moderately sized matrices, and we show through numerical experiments the effectiveness of the algorithm. We also show that the same algorithm works for preconditioned matrices, a result which is important in practical applications. Then, we explain how to use the approximated expansion on the whole spectrum for large matrices, whereas in earlier works its applicability was restricted only to certain matrix sizes and to a subset of the spectrum. Next, we demonstrate how to use the so-developed techniques to investigate, solve, and improve the accuracy in the eigenvalue computations for various differential problems discretized by the isogeometric analysis (IgA) method. Lastly, we discuss a class of non-monotone symbols for which we construct the sampling grid yielding exact eigenvalues and eigenvectors.

To summarize, we show, both theoretically and numerically, the applicability of the presented matrix-less methods for a wide variety of problems.

PrimeFaces.cw("Panel","tryPanel",{id:"formSmash:items:resultList:4:j_idt629:0:abstractPanel",widgetVar:"tryPanel",toggleable:true,toggleSpeed:500,collapsed:false,toggleOrientation:"vertical",closable:true,closeSpeed:500}); List of papers PrimeFaces.cw("SelectBooleanButton","widget_formSmash_items_resultList_4_j_idt633",{id:"formSmash:items:resultList:4:j_idt633",widgetVar:"widget_formSmash_items_resultList_4_j_idt633",onLabel:"List of papers",offLabel:"List of papers",onIcon:"ui-icon-triangle-1-s",offIcon:"ui-icon-triangle-1-e"}); 1. Are the eigenvalues of banded symmetric Toeplitz matrices known in almost closed form?Open this publication in new window or tab >>Are the eigenvalues of banded symmetric Toeplitz matrices known in almost closed form?### Ekström, Sven-Erik

### Garoni, Carlo

### Serra-Capizzano, Stefano

PrimeFaces.cw("AccordionPanel","widget_formSmash_items_resultList_4_j_idt634_0_overlay_some",{id:"formSmash:items:resultList:4:j_idt634:0:overlay:some",widgetVar:"widget_formSmash_items_resultList_4_j_idt634_0_overlay_some",multiple:true}); PrimeFaces.cw("AccordionPanel","widget_formSmash_items_resultList_4_j_idt634_0_overlay_otherAuthors",{id:"formSmash:items:resultList:4:j_idt634:0:overlay:otherAuthors",widgetVar:"widget_formSmash_items_resultList_4_j_idt634_0_overlay_otherAuthors",multiple:true}); 2018 (English)In: Experimental Mathematics, ISSN 1058-6458, E-ISSN 1944-950X, Vol. 27, p. 478-487Article in journal (Refereed) Published##### National Category

Computational Mathematics##### Identifiers

urn:nbn:se:uu:diva-322240 (URN)10.1080/10586458.2017.1320241 (DOI)000455366200011 ()PrimeFaces.cw("AccordionPanel","widget_formSmash_items_resultList_4_j_idt634_0_overlay_j_idt809",{id:"formSmash:items:resultList:4:j_idt634:0:overlay:j_idt809",widgetVar:"widget_formSmash_items_resultList_4_j_idt634_0_overlay_j_idt809",multiple:true}); PrimeFaces.cw("AccordionPanel","widget_formSmash_items_resultList_4_j_idt634_0_overlay_j_idt815",{id:"formSmash:items:resultList:4:j_idt634:0:overlay:j_idt815",widgetVar:"widget_formSmash_items_resultList_4_j_idt634_0_overlay_j_idt815",multiple:true}); PrimeFaces.cw("AccordionPanel","widget_formSmash_items_resultList_4_j_idt634_0_overlay_j_idt821",{id:"formSmash:items:resultList:4:j_idt634:0:overlay:j_idt821",widgetVar:"widget_formSmash_items_resultList_4_j_idt634_0_overlay_j_idt821",multiple:true}); $(function(){PrimeFaces.cw("OverlayPanel","overlay1096342",{id:"formSmash:items:resultList:4:j_idt634:0:j_idt638",widgetVar:"overlay1096342",target:"formSmash:items:resultList:4:j_idt634:0:partsLink",showEvent:"mousedown",hideEvent:"mousedown",showEffect:"blind",hideEffect:"fade",appendToBody:true});}); 2. Are the eigenvalues of preconditioned banded symmetric Toeplitz matrices known in almost closed form?Open this publication in new window or tab >>Are the eigenvalues of preconditioned banded symmetric Toeplitz matrices known in almost closed form?### Ahmad, Fayyaz

### Al-Aidarous, Eman S.

### Alrehaili, Dina A.

### Ekström, Sven-Erik

PrimeFaces.cw("AccordionPanel","widget_formSmash_items_resultList_4_j_idt634_1_overlay_some",{id:"formSmash:items:resultList:4:j_idt634:1:overlay:some",widgetVar:"widget_formSmash_items_resultList_4_j_idt634_1_overlay_some",multiple:true}); ### Furci, Isabella

### Serra-Capizzano, Stefano

PrimeFaces.cw("AccordionPanel","widget_formSmash_items_resultList_4_j_idt634_1_overlay_otherAuthors",{id:"formSmash:items:resultList:4:j_idt634:1:overlay:otherAuthors",widgetVar:"widget_formSmash_items_resultList_4_j_idt634_1_overlay_otherAuthors",multiple:true}); Show others... PrimeFaces.cw("SelectBooleanButton","widget_formSmash_items_resultList_4_j_idt634_1_overlay_j_idt652",{id:"formSmash:items:resultList:4:j_idt634:1:overlay:j_idt652",widgetVar:"widget_formSmash_items_resultList_4_j_idt634_1_overlay_j_idt652",onLabel:"Hide others...",offLabel:"Show others..."}); 2018 (English)In: Numerical Algorithms, ISSN 1017-1398, E-ISSN 1572-9265, Vol. 78, p. 867-893Article in journal (Refereed) Published##### National Category

Computational Mathematics##### Identifiers

urn:nbn:se:uu:diva-328780 (URN)10.1007/s11075-017-0404-z (DOI)000435692900010 ()PrimeFaces.cw("AccordionPanel","widget_formSmash_items_resultList_4_j_idt634_1_overlay_j_idt809",{id:"formSmash:items:resultList:4:j_idt634:1:overlay:j_idt809",widgetVar:"widget_formSmash_items_resultList_4_j_idt634_1_overlay_j_idt809",multiple:true}); PrimeFaces.cw("AccordionPanel","widget_formSmash_items_resultList_4_j_idt634_1_overlay_j_idt815",{id:"formSmash:items:resultList:4:j_idt634:1:overlay:j_idt815",widgetVar:"widget_formSmash_items_resultList_4_j_idt634_1_overlay_j_idt815",multiple:true}); PrimeFaces.cw("AccordionPanel","widget_formSmash_items_resultList_4_j_idt634_1_overlay_j_idt821",{id:"formSmash:items:resultList:4:j_idt634:1:overlay:j_idt821",widgetVar:"widget_formSmash_items_resultList_4_j_idt634_1_overlay_j_idt821",multiple:true}); $(function(){PrimeFaces.cw("OverlayPanel","overlay1137530",{id:"formSmash:items:resultList:4:j_idt634:1:j_idt638",widgetVar:"overlay1137530",target:"formSmash:items:resultList:4:j_idt634:1:partsLink",showEvent:"mousedown",hideEvent:"mousedown",showEffect:"blind",hideEffect:"fade",appendToBody:true});}); 3. A matrix-less and parallel interpolation–extrapolation algorithm for computing the eigenvalues of preconditioned banded symmetric Toeplitz matricesOpen this publication in new window or tab >>A matrix-less and parallel interpolation–extrapolation algorithm for computing the eigenvalues of preconditioned banded symmetric Toeplitz matrices### Ekström, Sven-Erik

### Garoni, Carlo

PrimeFaces.cw("AccordionPanel","widget_formSmash_items_resultList_4_j_idt634_2_overlay_some",{id:"formSmash:items:resultList:4:j_idt634:2:overlay:some",widgetVar:"widget_formSmash_items_resultList_4_j_idt634_2_overlay_some",multiple:true}); PrimeFaces.cw("AccordionPanel","widget_formSmash_items_resultList_4_j_idt634_2_overlay_otherAuthors",{id:"formSmash:items:resultList:4:j_idt634:2:overlay:otherAuthors",widgetVar:"widget_formSmash_items_resultList_4_j_idt634_2_overlay_otherAuthors",multiple:true}); 2019 (English)In: Numerical Algorithms, ISSN 1017-1398, E-ISSN 1572-9265, Vol. 80, p. 819-848Article in journal (Refereed) Published##### National Category

Computational Mathematics##### Identifiers

urn:nbn:se:uu:diva-346734 (URN)10.1007/s11075-018-0508-0 (DOI)000461382900007 ()PrimeFaces.cw("AccordionPanel","widget_formSmash_items_resultList_4_j_idt634_2_overlay_j_idt809",{id:"formSmash:items:resultList:4:j_idt634:2:overlay:j_idt809",widgetVar:"widget_formSmash_items_resultList_4_j_idt634_2_overlay_j_idt809",multiple:true}); PrimeFaces.cw("AccordionPanel","widget_formSmash_items_resultList_4_j_idt634_2_overlay_j_idt815",{id:"formSmash:items:resultList:4:j_idt634:2:overlay:j_idt815",widgetVar:"widget_formSmash_items_resultList_4_j_idt634_2_overlay_j_idt815",multiple:true}); PrimeFaces.cw("AccordionPanel","widget_formSmash_items_resultList_4_j_idt634_2_overlay_j_idt821",{id:"formSmash:items:resultList:4:j_idt634:2:overlay:j_idt821",widgetVar:"widget_formSmash_items_resultList_4_j_idt634_2_overlay_j_idt821",multiple:true}); $(function(){PrimeFaces.cw("OverlayPanel","overlay1192013",{id:"formSmash:items:resultList:4:j_idt634:2:j_idt638",widgetVar:"overlay1192013",target:"formSmash:items:resultList:4:j_idt634:2:partsLink",showEvent:"mousedown",hideEvent:"mousedown",showEffect:"blind",hideEffect:"fade",appendToBody:true});}); 4. Are the eigenvalues of the B-spline IgA approximation of −*Δu*=*λu*known in almost closed form?Open this publication in new window or tab >>Are the eigenvalues of the B-spline IgA approximation of −*Δu*=*λu*known in almost closed form?### Ekström, Sven-Erik

### Furci, Isabella

### Serra-Capizzano, Stefano

PrimeFaces.cw("AccordionPanel","widget_formSmash_items_resultList_4_j_idt634_3_overlay_some",{id:"formSmash:items:resultList:4:j_idt634:3:overlay:some",widgetVar:"widget_formSmash_items_resultList_4_j_idt634_3_overlay_some",multiple:true}); PrimeFaces.cw("AccordionPanel","widget_formSmash_items_resultList_4_j_idt634_3_overlay_otherAuthors",{id:"formSmash:items:resultList:4:j_idt634:3:overlay:otherAuthors",widgetVar:"widget_formSmash_items_resultList_4_j_idt634_3_overlay_otherAuthors",multiple:true}); 2017 (English)Report (Other academic)##### Series

Technical report / Department of Information Technology, Uppsala University, ISSN 1404-3203 ; 2017-016##### National Category

Computational Mathematics##### Identifiers

urn:nbn:se:uu:diva-328783 (URN)PrimeFaces.cw("AccordionPanel","widget_formSmash_items_resultList_4_j_idt634_3_overlay_j_idt809",{id:"formSmash:items:resultList:4:j_idt634:3:overlay:j_idt809",widgetVar:"widget_formSmash_items_resultList_4_j_idt634_3_overlay_j_idt809",multiple:true}); PrimeFaces.cw("AccordionPanel","widget_formSmash_items_resultList_4_j_idt634_3_overlay_j_idt815",{id:"formSmash:items:resultList:4:j_idt634:3:overlay:j_idt815",widgetVar:"widget_formSmash_items_resultList_4_j_idt634_3_overlay_j_idt815",multiple:true}); PrimeFaces.cw("AccordionPanel","widget_formSmash_items_resultList_4_j_idt634_3_overlay_j_idt821",{id:"formSmash:items:resultList:4:j_idt634:3:overlay:j_idt821",widgetVar:"widget_formSmash_items_resultList_4_j_idt634_3_overlay_j_idt821",multiple:true}); $(function(){PrimeFaces.cw("OverlayPanel","overlay1137562",{id:"formSmash:items:resultList:4:j_idt634:3:j_idt638",widgetVar:"overlay1137562",target:"formSmash:items:resultList:4:j_idt634:3:partsLink",showEvent:"mousedown",hideEvent:"mousedown",showEffect:"blind",hideEffect:"fade",appendToBody:true});}); 5. Eigenvalues and eigenvectors of banded Toeplitz matrices and the related symbolsOpen this publication in new window or tab >>Eigenvalues and eigenvectors of banded Toeplitz matrices and the related symbols### Ekström, Sven-Erik

### Serra-Capizzano, Stefano

PrimeFaces.cw("AccordionPanel","widget_formSmash_items_resultList_4_j_idt634_4_overlay_some",{id:"formSmash:items:resultList:4:j_idt634:4:overlay:some",widgetVar:"widget_formSmash_items_resultList_4_j_idt634_4_overlay_some",multiple:true}); PrimeFaces.cw("AccordionPanel","widget_formSmash_items_resultList_4_j_idt634_4_overlay_otherAuthors",{id:"formSmash:items:resultList:4:j_idt634:4:overlay:otherAuthors",widgetVar:"widget_formSmash_items_resultList_4_j_idt634_4_overlay_otherAuthors",multiple:true}); 2018 (English)In: Numerical Linear Algebra with Applications, ISSN 1070-5325, E-ISSN 1099-1506, Vol. 25, p. e2137:1-17, article id e2137Article in journal (Refereed) Published##### National Category

Computational Mathematics##### Identifiers

urn:nbn:se:uu:diva-340511 (URN)10.1002/nla.2137 (DOI)000448861300001 ()PrimeFaces.cw("AccordionPanel","widget_formSmash_items_resultList_4_j_idt634_4_overlay_j_idt809",{id:"formSmash:items:resultList:4:j_idt634:4:overlay:j_idt809",widgetVar:"widget_formSmash_items_resultList_4_j_idt634_4_overlay_j_idt809",multiple:true}); PrimeFaces.cw("AccordionPanel","widget_formSmash_items_resultList_4_j_idt634_4_overlay_j_idt815",{id:"formSmash:items:resultList:4:j_idt634:4:overlay:j_idt815",widgetVar:"widget_formSmash_items_resultList_4_j_idt634_4_overlay_j_idt815",multiple:true}); PrimeFaces.cw("AccordionPanel","widget_formSmash_items_resultList_4_j_idt634_4_overlay_j_idt821",{id:"formSmash:items:resultList:4:j_idt634:4:overlay:j_idt821",widgetVar:"widget_formSmash_items_resultList_4_j_idt634_4_overlay_j_idt821",multiple:true}); $(function(){PrimeFaces.cw("OverlayPanel","overlay1179054",{id:"formSmash:items:resultList:4:j_idt634:4:j_idt638",widgetVar:"overlay1179054",target:"formSmash:items:resultList:4:j_idt634:4:partsLink",showEvent:"mousedown",hideEvent:"mousedown",showEffect:"blind",hideEffect:"fade",appendToBody:true});}); PrimeFaces.cw("Panel","tryPanel",{id:"formSmash:items:resultList:4:partsPanel",widgetVar:"tryPanel",toggleable:true,toggleSpeed:500,collapsed:false,toggleOrientation:"vertical",closable:true,closeSpeed:500}); Download full text (pdf)fulltext$(function(){PrimeFaces.cw("Tooltip","widget_formSmash_items_resultList_4_j_idt854_0_j_idt857",{id:"formSmash:items:resultList:4:j_idt854:0:j_idt857",widgetVar:"widget_formSmash_items_resultList_4_j_idt854_0_j_idt857",showEffect:"fade",hideEffect:"fade",target:"formSmash:items:resultList:4:j_idt854:0:fullText"});}); Download (jpg)presentationsbild$(function(){PrimeFaces.cw("Tooltip","widget_formSmash_items_resultList_4_j_idt858_0_j_idt861",{id:"formSmash:items:resultList:4:j_idt858:0:j_idt861",widgetVar:"widget_formSmash_items_resultList_4_j_idt858_0_j_idt861",showEffect:"fade",hideEffect:"fade",target:"formSmash:items:resultList:4:j_idt858:0:otherAttachment"});}); Download (pdf)errata$(function(){PrimeFaces.cw("Tooltip","widget_formSmash_items_resultList_4_j_idt858_1_j_idt861",{id:"formSmash:items:resultList:4:j_idt858:1:j_idt861",widgetVar:"widget_formSmash_items_resultList_4_j_idt858_1_j_idt861",showEffect:"fade",hideEffect:"fade",target:"formSmash:items:resultList:4:j_idt858:1:otherAttachment"});}); 6. Agglomeration multigrid for the vertex-centered dual discontinuous Galerkin method Ekström, Sven-Erik PrimeFaces.cw("SelectBooleanButton","widget_formSmash_items_resultList_5_j_idt591",{id:"formSmash:items:resultList:5:j_idt591",widgetVar:"widget_formSmash_items_resultList_5_j_idt591",onLabel:"Ekström, Sven-Erik ",offLabel:"Ekström, Sven-Erik ",onIcon:"ui-icon-triangle-1-s",offIcon:"ui-icon-triangle-1-e"}); et al. PrimeFaces.cw("SelectBooleanButton","widget_formSmash_items_resultList_5_j_idt594",{id:"formSmash:items:resultList:5:j_idt594",widgetVar:"widget_formSmash_items_resultList_5_j_idt594",onLabel:"et al.",offLabel:"et al.",onIcon:"ui-icon-triangle-1-s",offIcon:"ui-icon-triangle-1-e"}); PrimeFaces.cw("Panel","testPanel",{id:"formSmash:items:resultList:5:orgPanel",widgetVar:"testPanel",toggleable:true,toggleSpeed:500,collapsed:false,toggleOrientation:"vertical",closable:true,closeSpeed:500}); Berggren, MartinPrimeFaces.cw("Panel","testPanel",{id:"formSmash:items:resultList:5:etAlPanel",widgetVar:"testPanel",toggleable:true,toggleSpeed:500,collapsed:false,toggleOrientation:"vertical",closable:true,closeSpeed:500}); Agglomeration multigrid for the vertex-centered dual discontinuous Galerkin method2010In: ADIGMA — A European Initiative on the Development of Adaptive Higher-Order Variational Methods for Aerospace Applications, Berlin: Springer-Verlag , 2010, p. 301-308Chapter in book (Refereed)7. Incorporating a discontinuous Galerkin method into the existing vertex-centered edge-based finite volume solver Edge Ekström, Sven-Erik PrimeFaces.cw("SelectBooleanButton","widget_formSmash_items_resultList_6_j_idt591",{id:"formSmash:items:resultList:6:j_idt591",widgetVar:"widget_formSmash_items_resultList_6_j_idt591",onLabel:"Ekström, Sven-Erik ",offLabel:"Ekström, Sven-Erik ",onIcon:"ui-icon-triangle-1-s",offIcon:"ui-icon-triangle-1-e"}); et al. PrimeFaces.cw("SelectBooleanButton","widget_formSmash_items_resultList_6_j_idt594",{id:"formSmash:items:resultList:6:j_idt594",widgetVar:"widget_formSmash_items_resultList_6_j_idt594",onLabel:"et al.",offLabel:"et al.",onIcon:"ui-icon-triangle-1-s",offIcon:"ui-icon-triangle-1-e"}); PrimeFaces.cw("Panel","testPanel",{id:"formSmash:items:resultList:6:orgPanel",widgetVar:"testPanel",toggleable:true,toggleSpeed:500,collapsed:false,toggleOrientation:"vertical",closable:true,closeSpeed:500}); Berggren, MartinPrimeFaces.cw("Panel","testPanel",{id:"formSmash:items:resultList:6:etAlPanel",widgetVar:"testPanel",toggleable:true,toggleSpeed:500,collapsed:false,toggleOrientation:"vertical",closable:true,closeSpeed:500}); Incorporating a discontinuous Galerkin method into the existing vertex-centered edge-based finite volume solver Edge2010In: ADIGMA — A European Initiative on the Development of Adaptive Higher-Order Variational Methods for Aerospace Applications, Berlin: Springer-Verlag , 2010, p. 39-52Chapter in book (Refereed)8. Are the eigenvalues of the B-spline isogeometric analysis approximation of −<em>Δu</em> = <em>λu</em> known in almost closed form? Ekström, Sven-Erik PrimeFaces.cw("SelectBooleanButton","widget_formSmash_items_resultList_7_j_idt591",{id:"formSmash:items:resultList:7:j_idt591",widgetVar:"widget_formSmash_items_resultList_7_j_idt591",onLabel:"Ekström, Sven-Erik ",offLabel:"Ekström, Sven-Erik ",onIcon:"ui-icon-triangle-1-s",offIcon:"ui-icon-triangle-1-e"}); et al. PrimeFaces.cw("SelectBooleanButton","widget_formSmash_items_resultList_7_j_idt594",{id:"formSmash:items:resultList:7:j_idt594",widgetVar:"widget_formSmash_items_resultList_7_j_idt594",onLabel:"et al.",offLabel:"et al.",onIcon:"ui-icon-triangle-1-s",offIcon:"ui-icon-triangle-1-e"}); PrimeFaces.cw("Panel","testPanel",{id:"formSmash:items:resultList:7:orgPanel",widgetVar:"testPanel",toggleable:true,toggleSpeed:500,collapsed:false,toggleOrientation:"vertical",closable:true,closeSpeed:500}); Furci, IsabellaGaroni, CarloManni, CarlaSerra-Capizzano, StefanoUppsala University, Disciplinary Domain of Science and Technology, Mathematics and Computer Science, Department of Information Technology, Division of Scientific Computing. Uppsala University, Disciplinary Domain of Science and Technology, Mathematics and Computer Science, Department of Information Technology, Numerical Analysis.Speleers, HendrikPrimeFaces.cw("Panel","testPanel",{id:"formSmash:items:resultList:7:etAlPanel",widgetVar:"testPanel",toggleable:true,toggleSpeed:500,collapsed:false,toggleOrientation:"vertical",closable:true,closeSpeed:500}); Are the eigenvalues of the B-spline isogeometric analysis approximation of −*Δu*=*λu*known in almost closed form?2018In: Numerical Linear Algebra with Applications, ISSN 1070-5325, E-ISSN 1099-1506, Vol. 25, p. e2198:1-34, article id e2198Article in journal (Refereed)9. Are the eigenvalues of the B-spline IgA approximation of −<em>Δu</em> = <em>λu</em> known in almost closed form? Ekström, Sven-Erik PrimeFaces.cw("SelectBooleanButton","widget_formSmash_items_resultList_8_j_idt591",{id:"formSmash:items:resultList:8:j_idt591",widgetVar:"widget_formSmash_items_resultList_8_j_idt591",onLabel:"Ekström, Sven-Erik ",offLabel:"Ekström, Sven-Erik ",onIcon:"ui-icon-triangle-1-s",offIcon:"ui-icon-triangle-1-e"}); et al. PrimeFaces.cw("SelectBooleanButton","widget_formSmash_items_resultList_8_j_idt594",{id:"formSmash:items:resultList:8:j_idt594",widgetVar:"widget_formSmash_items_resultList_8_j_idt594",onLabel:"et al.",offLabel:"et al.",onIcon:"ui-icon-triangle-1-s",offIcon:"ui-icon-triangle-1-e"}); PrimeFaces.cw("Panel","testPanel",{id:"formSmash:items:resultList:8:orgPanel",widgetVar:"testPanel",toggleable:true,toggleSpeed:500,collapsed:false,toggleOrientation:"vertical",closable:true,closeSpeed:500}); Furci, IsabellaSerra-Capizzano, StefanoUppsala University, Disciplinary Domain of Science and Technology, Mathematics and Computer Science, Department of Information Technology, Division of Scientific Computing. Uppsala University, Disciplinary Domain of Science and Technology, Mathematics and Computer Science, Department of Information Technology, Numerical Analysis.PrimeFaces.cw("Panel","testPanel",{id:"formSmash:items:resultList:8:etAlPanel",widgetVar:"testPanel",toggleable:true,toggleSpeed:500,collapsed:false,toggleOrientation:"vertical",closable:true,closeSpeed:500}); Are the eigenvalues of the B-spline IgA approximation of −*Δu*=*λu*known in almost closed form?2017Report (Other academic)10. Exact formulæ and matrix-less eigensolvers for block banded symmetric Toeplitz matrices Ekström, Sven-Erik PrimeFaces.cw("SelectBooleanButton","widget_formSmash_items_resultList_9_j_idt591",{id:"formSmash:items:resultList:9:j_idt591",widgetVar:"widget_formSmash_items_resultList_9_j_idt591",onLabel:"Ekström, Sven-Erik ",offLabel:"Ekström, Sven-Erik ",onIcon:"ui-icon-triangle-1-s",offIcon:"ui-icon-triangle-1-e"}); et al. PrimeFaces.cw("SelectBooleanButton","widget_formSmash_items_resultList_9_j_idt594",{id:"formSmash:items:resultList:9:j_idt594",widgetVar:"widget_formSmash_items_resultList_9_j_idt594",onLabel:"et al.",offLabel:"et al.",onIcon:"ui-icon-triangle-1-s",offIcon:"ui-icon-triangle-1-e"}); PrimeFaces.cw("Panel","testPanel",{id:"formSmash:items:resultList:9:orgPanel",widgetVar:"testPanel",toggleable:true,toggleSpeed:500,collapsed:false,toggleOrientation:"vertical",closable:true,closeSpeed:500}); Furci, IsabellaSerra-Capizzano, StefanoUppsala University, Disciplinary Domain of Science and Technology, Mathematics and Computer Science, Department of Information Technology, Division of Scientific Computing. Uppsala University, Disciplinary Domain of Science and Technology, Mathematics and Computer Science, Department of Information Technology, Numerical Analysis.PrimeFaces.cw("Panel","testPanel",{id:"formSmash:items:resultList:9:etAlPanel",widgetVar:"testPanel",toggleable:true,toggleSpeed:500,collapsed:false,toggleOrientation:"vertical",closable:true,closeSpeed:500}); Exact formulæ and matrix-less eigensolvers for block banded symmetric Toeplitz matrices2018In: BIT Numerical Mathematics, ISSN 0006-3835, E-ISSN 1572-9125, Vol. 58, p. 937-968Article in journal (Refereed)11. Exact formulæ and matrix-less eigensolvers for block banded symmetric Toeplitz matrices Ekström, Sven-Erik PrimeFaces.cw("SelectBooleanButton","widget_formSmash_items_resultList_10_j_idt591",{id:"formSmash:items:resultList:10:j_idt591",widgetVar:"widget_formSmash_items_resultList_10_j_idt591",onLabel:"Ekström, Sven-Erik ",offLabel:"Ekström, Sven-Erik ",onIcon:"ui-icon-triangle-1-s",offIcon:"ui-icon-triangle-1-e"}); et al. PrimeFaces.cw("SelectBooleanButton","widget_formSmash_items_resultList_10_j_idt594",{id:"formSmash:items:resultList:10:j_idt594",widgetVar:"widget_formSmash_items_resultList_10_j_idt594",onLabel:"et al.",offLabel:"et al.",onIcon:"ui-icon-triangle-1-s",offIcon:"ui-icon-triangle-1-e"}); PrimeFaces.cw("Panel","testPanel",{id:"formSmash:items:resultList:10:orgPanel",widgetVar:"testPanel",toggleable:true,toggleSpeed:500,collapsed:false,toggleOrientation:"vertical",closable:true,closeSpeed:500}); Furci, IsabellaSerra-Capizzano, StefanoUppsala University, Disciplinary Domain of Science and Technology, Mathematics and Computer Science, Department of Information Technology, Division of Scientific Computing. Uppsala University, Disciplinary Domain of Science and Technology, Mathematics and Computer Science, Department of Information Technology, Numerical Analysis.PrimeFaces.cw("Panel","testPanel",{id:"formSmash:items:resultList:10:etAlPanel",widgetVar:"testPanel",toggleable:true,toggleSpeed:500,collapsed:false,toggleOrientation:"vertical",closable:true,closeSpeed:500}); Exact formulæ and matrix-less eigensolvers for block banded symmetric Toeplitz matrices2018Report (Other academic)12. A matrix-less and parallel interpolation–extrapolation algorithm for computing the eigenvalues of preconditioned banded symmetric Toeplitz matrices Ekström, Sven-Erik PrimeFaces.cw("SelectBooleanButton","widget_formSmash_items_resultList_11_j_idt591",{id:"formSmash:items:resultList:11:j_idt591",widgetVar:"widget_formSmash_items_resultList_11_j_idt591",onLabel:"Ekström, Sven-Erik ",offLabel:"Ekström, Sven-Erik ",onIcon:"ui-icon-triangle-1-s",offIcon:"ui-icon-triangle-1-e"}); et al. PrimeFaces.cw("SelectBooleanButton","widget_formSmash_items_resultList_11_j_idt594",{id:"formSmash:items:resultList:11:j_idt594",widgetVar:"widget_formSmash_items_resultList_11_j_idt594",onLabel:"et al.",offLabel:"et al.",onIcon:"ui-icon-triangle-1-s",offIcon:"ui-icon-triangle-1-e"}); PrimeFaces.cw("Panel","testPanel",{id:"formSmash:items:resultList:11:orgPanel",widgetVar:"testPanel",toggleable:true,toggleSpeed:500,collapsed:false,toggleOrientation:"vertical",closable:true,closeSpeed:500}); Garoni, CarloPrimeFaces.cw("Panel","testPanel",{id:"formSmash:items:resultList:11:etAlPanel",widgetVar:"testPanel",toggleable:true,toggleSpeed:500,collapsed:false,toggleOrientation:"vertical",closable:true,closeSpeed:500}); A matrix-less and parallel interpolation–extrapolation algorithm for computing the eigenvalues of preconditioned banded symmetric Toeplitz matrices2019In: Numerical Algorithms, ISSN 1017-1398, E-ISSN 1572-9265, Vol. 80, p. 819-848Article in journal (Refereed)13. An interpolation–extrapolation algorithm for computing the eigenvalues of preconditioned banded symmetric Toeplitz matrices Ekström, Sven-Erik PrimeFaces.cw("SelectBooleanButton","widget_formSmash_items_resultList_12_j_idt591",{id:"formSmash:items:resultList:12:j_idt591",widgetVar:"widget_formSmash_items_resultList_12_j_idt591",onLabel:"Ekström, Sven-Erik ",offLabel:"Ekström, Sven-Erik ",onIcon:"ui-icon-triangle-1-s",offIcon:"ui-icon-triangle-1-e"}); et al. PrimeFaces.cw("SelectBooleanButton","widget_formSmash_items_resultList_12_j_idt594",{id:"formSmash:items:resultList:12:j_idt594",widgetVar:"widget_formSmash_items_resultList_12_j_idt594",onLabel:"et al.",offLabel:"et al.",onIcon:"ui-icon-triangle-1-s",offIcon:"ui-icon-triangle-1-e"}); PrimeFaces.cw("Panel","testPanel",{id:"formSmash:items:resultList:12:orgPanel",widgetVar:"testPanel",toggleable:true,toggleSpeed:500,collapsed:false,toggleOrientation:"vertical",closable:true,closeSpeed:500}); Garoni, CarloPrimeFaces.cw("Panel","testPanel",{id:"formSmash:items:resultList:12:etAlPanel",widgetVar:"testPanel",toggleable:true,toggleSpeed:500,collapsed:false,toggleOrientation:"vertical",closable:true,closeSpeed:500}); An interpolation–extrapolation algorithm for computing the eigenvalues of preconditioned banded symmetric Toeplitz matrices2017Report (Other academic)14. Are the eigenvalues of banded symmetric Toeplitz matrices known in almost closed form? Ekström, Sven-Erik PrimeFaces.cw("SelectBooleanButton","widget_formSmash_items_resultList_13_j_idt591",{id:"formSmash:items:resultList:13:j_idt591",widgetVar:"widget_formSmash_items_resultList_13_j_idt591",onLabel:"Ekström, Sven-Erik ",offLabel:"Ekström, Sven-Erik ",onIcon:"ui-icon-triangle-1-s",offIcon:"ui-icon-triangle-1-e"}); et al. PrimeFaces.cw("SelectBooleanButton","widget_formSmash_items_resultList_13_j_idt594",{id:"formSmash:items:resultList:13:j_idt594",widgetVar:"widget_formSmash_items_resultList_13_j_idt594",onLabel:"et al.",offLabel:"et al.",onIcon:"ui-icon-triangle-1-s",offIcon:"ui-icon-triangle-1-e"}); PrimeFaces.cw("Panel","testPanel",{id:"formSmash:items:resultList:13:orgPanel",widgetVar:"testPanel",toggleable:true,toggleSpeed:500,collapsed:false,toggleOrientation:"vertical",closable:true,closeSpeed:500}); Garoni, CarloSerra-Capizzano, StefanoUppsala University, Disciplinary Domain of Science and Technology, Mathematics and Computer Science, Department of Information Technology, Division of Scientific Computing. Uppsala University, Disciplinary Domain of Science and Technology, Mathematics and Computer Science, Department of Information Technology, Numerical Analysis.PrimeFaces.cw("Panel","testPanel",{id:"formSmash:items:resultList:13:etAlPanel",widgetVar:"testPanel",toggleable:true,toggleSpeed:500,collapsed:false,toggleOrientation:"vertical",closable:true,closeSpeed:500}); Are the eigenvalues of banded symmetric Toeplitz matrices known in almost closed form?2018In: Experimental Mathematics, ISSN 1058-6458, E-ISSN 1944-950X, Vol. 27, p. 478-487Article in journal (Refereed)Download full text (pdf)fulltext$(function(){PrimeFaces.cw("Tooltip","widget_formSmash_items_resultList_13_j_idt854_0_j_idt857",{id:"formSmash:items:resultList:13:j_idt854:0:j_idt857",widgetVar:"widget_formSmash_items_resultList_13_j_idt854_0_j_idt857",showEffect:"fade",hideEffect:"fade",target:"formSmash:items:resultList:13:j_idt854:0:fullText"});}); 15. Eigenvalue isogeometric approximations based on B-splines Ekström, Sven-Erik PrimeFaces.cw("SelectBooleanButton","widget_formSmash_items_resultList_14_j_idt591",{id:"formSmash:items:resultList:14:j_idt591",widgetVar:"widget_formSmash_items_resultList_14_j_idt591",onLabel:"Ekström, Sven-Erik ",offLabel:"Ekström, Sven-Erik ",onIcon:"ui-icon-triangle-1-s",offIcon:"ui-icon-triangle-1-e"}); et al. PrimeFaces.cw("SelectBooleanButton","widget_formSmash_items_resultList_14_j_idt594",{id:"formSmash:items:resultList:14:j_idt594",widgetVar:"widget_formSmash_items_resultList_14_j_idt594",onLabel:"et al.",offLabel:"et al.",onIcon:"ui-icon-triangle-1-s",offIcon:"ui-icon-triangle-1-e"}); PrimeFaces.cw("Panel","testPanel",{id:"formSmash:items:resultList:14:orgPanel",widgetVar:"testPanel",toggleable:true,toggleSpeed:500,collapsed:false,toggleOrientation:"vertical",closable:true,closeSpeed:500}); Serra-Capizzano, StefanoUppsala University, Disciplinary Domain of Science and Technology, Mathematics and Computer Science, Department of Information Technology, Division of Scientific Computing. Uppsala University, Disciplinary Domain of Science and Technology, Mathematics and Computer Science, Department of Information Technology, Numerical Analysis.PrimeFaces.cw("Panel","testPanel",{id:"formSmash:items:resultList:14:etAlPanel",widgetVar:"testPanel",toggleable:true,toggleSpeed:500,collapsed:false,toggleOrientation:"vertical",closable:true,closeSpeed:500}); Eigenvalue isogeometric approximations based on B-splines: Tools and results2018Report (Other academic)16. Eigenvalue isogeometric approximations based on B-splines Ekström, Sven-Erik PrimeFaces.cw("SelectBooleanButton","widget_formSmash_items_resultList_15_j_idt591",{id:"formSmash:items:resultList:15:j_idt591",widgetVar:"widget_formSmash_items_resultList_15_j_idt591",onLabel:"Ekström, Sven-Erik ",offLabel:"Ekström, Sven-Erik ",onIcon:"ui-icon-triangle-1-s",offIcon:"ui-icon-triangle-1-e"}); et al. PrimeFaces.cw("SelectBooleanButton","widget_formSmash_items_resultList_15_j_idt594",{id:"formSmash:items:resultList:15:j_idt594",widgetVar:"widget_formSmash_items_resultList_15_j_idt594",onLabel:"et al.",offLabel:"et al.",onIcon:"ui-icon-triangle-1-s",offIcon:"ui-icon-triangle-1-e"}); PrimeFaces.cw("Panel","testPanel",{id:"formSmash:items:resultList:15:orgPanel",widgetVar:"testPanel",toggleable:true,toggleSpeed:500,collapsed:false,toggleOrientation:"vertical",closable:true,closeSpeed:500}); Serra-Capizzano, StefanoUppsala University, Disciplinary Domain of Science and Technology, Mathematics and Computer Science, Department of Information Technology, Division of Scientific Computing. Uppsala University, Disciplinary Domain of Science and Technology, Mathematics and Computer Science, Department of Information Technology, Numerical Analysis.PrimeFaces.cw("Panel","testPanel",{id:"formSmash:items:resultList:15:etAlPanel",widgetVar:"testPanel",toggleable:true,toggleSpeed:500,collapsed:false,toggleOrientation:"vertical",closable:true,closeSpeed:500}); Eigenvalue isogeometric approximations based on B-splines: Tools and results2019In: Advanced Methods for Geometric Modeling and Numerical Simulation, Springer, 2019, p. 57-76Chapter in book (Refereed)17. Eigenvalues and eigenvectors of banded Toeplitz matrices and the related symbols Ekström, Sven-Erik PrimeFaces.cw("SelectBooleanButton","widget_formSmash_items_resultList_16_j_idt591",{id:"formSmash:items:resultList:16:j_idt591",widgetVar:"widget_formSmash_items_resultList_16_j_idt591",onLabel:"Ekström, Sven-Erik ",offLabel:"Ekström, Sven-Erik ",onIcon:"ui-icon-triangle-1-s",offIcon:"ui-icon-triangle-1-e"}); et al. PrimeFaces.cw("SelectBooleanButton","widget_formSmash_items_resultList_16_j_idt594",{id:"formSmash:items:resultList:16:j_idt594",widgetVar:"widget_formSmash_items_resultList_16_j_idt594",onLabel:"et al.",offLabel:"et al.",onIcon:"ui-icon-triangle-1-s",offIcon:"ui-icon-triangle-1-e"}); PrimeFaces.cw("Panel","testPanel",{id:"formSmash:items:resultList:16:orgPanel",widgetVar:"testPanel",toggleable:true,toggleSpeed:500,collapsed:false,toggleOrientation:"vertical",closable:true,closeSpeed:500}); Serra-Capizzano, StefanoUppsala University, Disciplinary Domain of Science and Technology, Mathematics and Computer Science, Department of Information Technology, Division of Scientific Computing. Uppsala University, Disciplinary Domain of Science and Technology, Mathematics and Computer Science, Department of Information Technology, Numerical Analysis.PrimeFaces.cw("Panel","testPanel",{id:"formSmash:items:resultList:16:etAlPanel",widgetVar:"testPanel",toggleable:true,toggleSpeed:500,collapsed:false,toggleOrientation:"vertical",closable:true,closeSpeed:500}); Eigenvalues and eigenvectors of banded Toeplitz matrices and the related symbols2017Report (Other academic)18. Eigenvalues and eigenvectors of banded Toeplitz matrices and the related symbols Ekström, Sven-Erik PrimeFaces.cw("SelectBooleanButton","widget_formSmash_items_resultList_17_j_idt591",{id:"formSmash:items:resultList:17:j_idt591",widgetVar:"widget_formSmash_items_resultList_17_j_idt591",onLabel:"Ekström, Sven-Erik ",offLabel:"Ekström, Sven-Erik ",onIcon:"ui-icon-triangle-1-s",offIcon:"ui-icon-triangle-1-e"}); et al. PrimeFaces.cw("SelectBooleanButton","widget_formSmash_items_resultList_17_j_idt594",{id:"formSmash:items:resultList:17:j_idt594",widgetVar:"widget_formSmash_items_resultList_17_j_idt594",onLabel:"et al.",offLabel:"et al.",onIcon:"ui-icon-triangle-1-s",offIcon:"ui-icon-triangle-1-e"}); PrimeFaces.cw("Panel","testPanel",{id:"formSmash:items:resultList:17:orgPanel",widgetVar:"testPanel",toggleable:true,toggleSpeed:500,collapsed:false,toggleOrientation:"vertical",closable:true,closeSpeed:500}); Serra-Capizzano, StefanoUppsala University, Disciplinary Domain of Science and Technology, Mathematics and Computer Science, Department of Information Technology, Division of Scientific Computing. Uppsala University, Disciplinary Domain of Science and Technology, Mathematics and Computer Science, Department of Information Technology, Numerical Analysis.PrimeFaces.cw("Panel","testPanel",{id:"formSmash:items:resultList:17:etAlPanel",widgetVar:"testPanel",toggleable:true,toggleSpeed:500,collapsed:false,toggleOrientation:"vertical",closable:true,closeSpeed:500}); Eigenvalues and eigenvectors of banded Toeplitz matrices and the related symbols2018In: Numerical Linear Algebra with Applications, ISSN 1070-5325, E-ISSN 1099-1506, Vol. 25, p. e2137:1-17, article id e2137Article in journal (Refereed)19. Eigenvalues of banded symmetric Toeplitz matrices are known almost in closed form? Ekström, Sven-Erik PrimeFaces.cw("SelectBooleanButton","widget_formSmash_items_resultList_18_j_idt591",{id:"formSmash:items:resultList:18:j_idt591",widgetVar:"widget_formSmash_items_resultList_18_j_idt591",onLabel:"Ekström, Sven-Erik ",offLabel:"Ekström, Sven-Erik ",onIcon:"ui-icon-triangle-1-s",offIcon:"ui-icon-triangle-1-e"}); et al. PrimeFaces.cw("SelectBooleanButton","widget_formSmash_items_resultList_18_j_idt594",{id:"formSmash:items:resultList:18:j_idt594",widgetVar:"widget_formSmash_items_resultList_18_j_idt594",onLabel:"et al.",offLabel:"et al.",onIcon:"ui-icon-triangle-1-s",offIcon:"ui-icon-triangle-1-e"}); PrimeFaces.cw("Panel","testPanel",{id:"formSmash:items:resultList:18:orgPanel",widgetVar:"testPanel",toggleable:true,toggleSpeed:500,collapsed:false,toggleOrientation:"vertical",closable:true,closeSpeed:500}); Serra-Capizzano, StefanoUppsala University, Disciplinary Domain of Science and Technology, Mathematics and Computer Science, Department of Information Technology, Division of Scientific Computing. Uppsala University, Disciplinary Domain of Science and Technology, Mathematics and Computer Science, Department of Information Technology, Numerical Analysis.PrimeFaces.cw("Panel","testPanel",{id:"formSmash:items:resultList:18:etAlPanel",widgetVar:"testPanel",toggleable:true,toggleSpeed:500,collapsed:false,toggleOrientation:"vertical",closable:true,closeSpeed:500}); Eigenvalues of banded symmetric Toeplitz matrices are known almost in closed form?2016Report (Other academic)20. Symbol-based analysis of finite element and isogeometric B-spline discretizations of eigenvalue problems Garoni, Carloet al. PrimeFaces.cw("SelectBooleanButton","widget_formSmash_items_resultList_19_j_idt594",{id:"formSmash:items:resultList:19:j_idt594",widgetVar:"widget_formSmash_items_resultList_19_j_idt594",onLabel:"et al.",offLabel:"et al.",onIcon:"ui-icon-triangle-1-s",offIcon:"ui-icon-triangle-1-e"}); PrimeFaces.cw("Panel","testPanel",{id:"formSmash:items:resultList:19:orgPanel",widgetVar:"testPanel",toggleable:true,toggleSpeed:500,collapsed:false,toggleOrientation:"vertical",closable:true,closeSpeed:500}); Speleers, HendrikEkström, Sven-ErikUppsala University, Disciplinary Domain of Science and Technology, Mathematics and Computer Science, Department of Information Technology, Division of Scientific Computing. Uppsala University, Disciplinary Domain of Science and Technology, Mathematics and Computer Science, Department of Information Technology, Numerical Analysis.Reali, AlessandroSerra-Capizzano, StefanoUppsala University, Disciplinary Domain of Science and Technology, Mathematics and Computer Science, Department of Information Technology, Division of Scientific Computing. Uppsala University, Disciplinary Domain of Science and Technology, Mathematics and Computer Science, Department of Information Technology, Numerical Analysis.Hughes, Thomas J. R.PrimeFaces.cw("Panel","testPanel",{id:"formSmash:items:resultList:19:etAlPanel",widgetVar:"testPanel",toggleable:true,toggleSpeed:500,collapsed:false,toggleOrientation:"vertical",closable:true,closeSpeed:500}); Symbol-based analysis of finite element and isogeometric B-spline discretizations of eigenvalue problems: Exposition and review2019In: Archives of Computational Methods in Engineering, ISSN 1134-3060, E-ISSN 1886-1784, Vol. 26, p. 1639-1690Article, review/survey (Refereed)

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