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  • 1.
    Carlson, Karin
    et al.
    Uppsala University, Teknisk-naturvetenskapliga vetenskapsområdet, Faculty of Science and Technology, Biology, Department of Cell and Molecular Biology. Earth Sciences, Department of Earth Sciences, Air and Water Science. Physics, Department of Physics and Materials Science, Theoretical Physics. Uppsala University, Teknisk-naturvetenskapliga vetenskapsområdet, Faculty of Science and Technology, Biology, Department of Cell and Molecular Biology, Microbiology. Mathematics and Computer Science, Department of Mathematics, Mathematics I -V.
    Kiselman, Christer
    Earth Sciences, Department of Earth Sciences, Air and Water Science. Physics, Department of Physics and Materials Science, Theoretical Physics. Uppsala University, Teknisk-naturvetenskapliga vetenskapsområdet, Faculty of Science and Technology, Biology, Department of Cell and Molecular Biology, Microbiology. Mathematics and Computer Science, Department of Mathematics, Mathematics I -V.
    Danielsson, Ulf
    Department of Theoretical Physics. Earth Sciences, Department of Earth Sciences, Air and Water Science. Physics, Department of Physics and Materials Science, Theoretical Physics. Uppsala University, Teknisk-naturvetenskapliga vetenskapsområdet, Faculty of Science and Technology, Biology, Department of Cell and Molecular Biology, Microbiology. Mathematics and Computer Science, Department of Mathematics, Mathematics I -V.
    Halldin, Sven
    Earth Sciences, Department of Earth Sciences, Air and Water Science. Physics, Department of Physics and Materials Science, Theoretical Physics. Uppsala University, Teknisk-naturvetenskapliga vetenskapsområdet, Faculty of Science and Technology, Biology, Department of Cell and Molecular Biology, Microbiology. Mathematics and Computer Science, Department of Mathematics, Mathematics I -V.
    Mattsson, Amalia
    Language policy for a bilingual faculty2005In: Bi- and multilingual universities, Helsinki, Finland, Sept 1-3, 2005, 2005Conference paper (Refereed)
    Abstract [en]

    The Faculty of Science and Technology of Uppsala University is for all practical purposes a bilingual institution, using both Swedish and English in education and research. Extensive use of English in teaching, and also in intrauniversity communication, permits recruitment of nonSwedishspeaking students, researchers and professors, and also prepares our students for

    international careers. However, the introduction of English has been somewhat haphazard, not taking into account possible negative effects on communication in Swedish, nor on students'

    learning.

    In order to improve students' and professors' language skills, and achieve a good balance between Swedish and English, the faculty board appointed a language committee in 2003 whose task was to propose a language policy for the faculty. A first part, stating as a main goal that all communication from and within the faculty should have the highest quality possible, has been adopted by the board. A second part including language planning with respect to status, corpus, and acquisition for both Swedish and English to accomplish this goal was sent to the board of the faculty in May, 2005. Implementation of this policy will affect all faculty activities, especially education. Suggested

    annual reports on language status will raise our present minimal knowledge about possible domain losses and allow for relevant countermeasures.

  • 2. Ekstig, Kerstin
    et al.
    Kaijser, Sten
    Uppsala University, Disciplinary Domain of Science and Technology, Mathematics and Computer Science, Department of Mathematics.
    Kiselman, Christer O.
    Uppsala University, Disciplinary Domain of Science and Technology, Mathematics and Computer Science, Department of Information Technology, Division of Visual Information and Interaction.
    Lindahl, Lars-Åke
    Uppsala University, Disciplinary Domain of Science and Technology, Mathematics and Computer Science, Department of Mathematics.
    Vretblad, Anders
    Sonja Lyttkens: Minnesord2015In: Upsala Nya Tidning, Vol. 125, no 12, p. B13-B13Article in journal (Other (popular science, discussion, etc.))
    Abstract [en]

    Sonja Lyttkens was born in 1919 and died in 2014. She was the second woman to get a PhD in mathematics in Sweden, and the first to become a university lecturer.

  • 3.
    Kiselman, Christer
    Uppsala University, Disciplinary Domain of Science and Technology, Mathematics and Computer Science, Department of Information Technology, Division of Visual Information and Interaction. Uppsala University, Disciplinary Domain of Science and Technology, Mathematics and Computer Science, Department of Information Technology, Computerized Image Analysis and Human-Computer Interaction.
    A word from the editor2018In: Esperantologio / Esperanto Studies, ISSN 1404-4749, no 8, p. 8-12Article in journal (Other academic)
    Abstract [en]

    Introduction in English to Issue 8 of the journal.

  • 4.
    Kiselman, Christer
    Uppsala University, Teknisk-naturvetenskapliga vetenskapsområdet, Mathematics and Computer Science, Department of Mathematics. Uppsala University, Teknisk-naturvetenskapliga vetenskapsområdet, Mathematics and Computer Science, Department of Mathematics, Mathematics I -V.
    Attenuating the singularities of plurisubhamonic functions1994In: Annales Polonici Mathematici, Vol. 60, p. 173-197Article in journal (Refereed)
  • 5.
    Kiselman, Christer
    Uppsala University, Teknisk-naturvetenskapliga vetenskapsområdet, Mathematics and Computer Science, Department of Mathematics. Uppsala University, Teknisk-naturvetenskapliga vetenskapsområdet, Mathematics and Computer Science, Department of Mathematics, Mathematics I -V.
    Convex functions on discrete sets2004Report (Other scientific)
  • 6.
    Kiselman, Christer
    Uppsala University, Teknisk-naturvetenskapliga vetenskapsområdet, Mathematics and Computer Science, Department of Mathematics.
    Digital Geometry and Mathematical Morphology2004Report (Other scientific)
  • 7.
    Kiselman, Christer
    Uppsala University, Disciplinary Domain of Science and Technology, Mathematics and Computer Science, Department of Mathematics, Analysis and Applied Mathematics.
    Diskreta kaj reela optimumado2012In: Prelegaro, Parto II.  Internacia Simpozio "Apliko de Esperanto en la profesia agado" / [ed] Bozhidar Leonov, Karlovo: Akademio Internacia de la Sciencoj , 2012, p. 72-84Chapter in book (Other academic)
  • 8.
    Kiselman, Christer
    Uppsala University, Disciplinary Domain of Science and Technology, Mathematics and Computer Science, Department of Mathematics, Mathematics I -V.
    Enkonduko al distribucioj [Introduction to Distributions]2007In: Acta Sanmariensia, Vol. IV, no 4, p. 105-132Article in journal (Refereed)
    Abstract [en]

    Therefore distributions.  The article presents some difficulties in classical mathematical analysis andshows how one can overcome them using mathematical objects which are more general than functions of several real variables: the distributions. We considerderivatives, Fourier transforms, and convolutions of distributions.

  • 9.
    Kiselman, Christer
    Uppsala University, Disciplinary Domain of Science and Technology, Mathematics and Computer Science, Department of Information Technology, Division of Visual Information and Interaction. Uppsala University, Disciplinary Domain of Science and Technology, Mathematics and Computer Science, Department of Information Technology, Computerized Image Analysis and Human-Computer Interaction.
    Enkonduko: [Introduction]2018In: Aliroj al esperanto: [Arriving to Esperanto] / [ed] Kiselman, Christer Oscar; Corsetti, Renato; Dasgupto, Probal, Dobrichovice: KAVA-PECH , 2018, p. 5-8Chapter in book (Other academic)
    Abstract [en]

    The book contains fourteen chapters on Esperanto as a language, on the ideas behind Esperanto, and on the culture carried by the language. The introduction presents the contents. 

  • 10.
    Kiselman, Christer
    Uppsala University, Disciplinary Domain of Science and Technology, Mathematics and Computer Science, Department of Mathematics.
    Ensembles de sous-niveau et images inverses des fonctions plurisousharmoniques2000In: Bulletin des Sciences Mathématiques, Vol. 124, no 1, p. 75-Article in journal (Refereed)
    Abstract [en]

    Nous déterminons quand le nombre de Lelong de l'image inverse d'une fonction plurisousharmonique par une application holomorphe peut être majoré par une constante fois le nombre de Lelong de la fonction de départ.

  • 11.
    Kiselman, Christer
    Uppsala University, Disciplinary Domain of Science and Technology, Mathematics and Computer Science, Department of Mathematics, Mathematics I -V. Uppsala University, Disciplinary Domain of Science and Technology, Mathematics and Computer Science, Department of Mathematics, Analysis and Applied Mathematics.
    Esperantologio / Esperanto Studies / EES / Issue No. 11999Collection (editor) (Refereed)
    Abstract [en]

    EES is an international journal devoted to all phenomena relating to Esperanto. It publishes articles based on original studies of the linguistic, historical, literary, psychological, sociological, and political aspects of Esperanto. The first issue was published in 1999.

  • 12.
    Kiselman, Christer
    Uppsala University, Disciplinary Domain of Science and Technology.
    Esperantologio / Esperanto Studies / EES / Issue No. 22001Collection (editor) (Refereed)
    Abstract [en]

    Esperantologio / Esperanto Studies is an international journal on all phenomena relating to Esperanto.  It publishes articles based on original studies of the linguistic, historical, literary, psychological, sociological, and political aspects of Esperanto.

  • 13.
    Kiselman, Christer
    Uppsala University, Disciplinary Domain of Science and Technology.
    Esperantologio / Esperanto Studies / EES / Issue No. 32005Collection (editor) (Refereed)
    Abstract [en]

    Esperantologio / Esperanto Studies / EES is an international journal on all phenomena relating to Esperanto.  It publishes articles based on original studies of the linguistic, historical, literary, psychological, sociological, and political aspects of Esperanto.

  • 14.
    Kiselman, Christer
    Uppsala University, Disciplinary Domain of Science and Technology.
    Esperantologio / Esperanto Studies / EES / Issue No. 42009Collection (editor) (Refereed)
    Abstract [en]

    Esperantologio / Esperanto Studies is an international journal on all phenomena relating to Esperanto.  It publishes articles based on original studies of the linguistic, historical, literary, psychological, sociological, and political aspects of Esperanto.

  • 15.
    Kiselman, Christer
    Uppsala University, Disciplinary Domain of Science and Technology, Mathematics and Computer Science, Department of Mathematics.
    Esperantologio / Esperanto Studies / EES / Issue No. 52011Collection (editor) (Refereed)
    Abstract [en]

    Esperantologio / Esperanto Studies is an international journal on all phenomena relating to Esperanto.  It publishes articles based on original studies of the linguistic, historical, literary, psychological, sociological, and political aspects of Esperanto.

  • 16.
    Kiselman, Christer
    Uppsala University, Disciplinary Domain of Science and Technology, Mathematics and Computer Science, Department of Information Technology, Division of Visual Information and Interaction. Uppsala University, Disciplinary Domain of Science and Technology, Mathematics and Computer Science, Department of Information Technology, Computerized Image Analysis and Human-Computer Interaction.
    Esperantologio / Esperanto Studies, Issue 8: Salutvorto de la redaktoro2018In: Esperantologio / Esperanto Studies, ISSN 1404-4749, no 8, p. 3-7Article in journal (Other academic)
    Abstract [en]

    Introduction in Esperanto to Issue No. 8 of the journal.

  • 17.
    Kiselman, Christer
    Uppsala University, Disciplinary Domain of Science and Technology, Mathematics and Computer Science, Department of Mathematics, Analysis and Applied Mathematics.
    Frozen history: Reconstructing the climate of the past2009In: Analysis, Partial Differential Equations and Applications: The Vladimir Maz'ya Anniversary Volume / [ed] Cialdea, Alberto; Lanzara, Flavia; Ricci, Paolo Emilio, Basel: Birkhäuser , 2009, p. 97-114Chapter in book (Other academic)
    Abstract [en]

    The ice caps on Greenland and Antarctica are huge memory banks: the temperature of the past is preserved deep in the ice. In this paper we present a mathematical model for the reconstruction of past temperatures from records of the present ones in a drilled hole.

  • 18.
    Kiselman, Christer
    Uppsala University, Teknisk-naturvetenskapliga vetenskapsområdet, Mathematics and Computer Science, Department of Mathematics.
    Functions on discrete sets holomorphic in the sense of Isaacs, or monodiffric functions of the first kind2005Report (Other scientific)
  • 19.
    Kiselman, Christer
    Uppsala University, Disciplinary Domain of Science and Technology, Mathematics and Computer Science, Department of Mathematics.
    Kreado de matematikaj terminoj2001In: Lingva planado kaj leksikologio; Language Planning and Lexicology: Proceedings of an International Symposium Held in Zagreb, July 28-30, 2001, Fonto, Chapecó-SC & Brasília-DF , 2001, p. 173-187Chapter in book (Other academic)
  • 20.
    Kiselman, Christer
    Uppsala University, Teknisk-naturvetenskapliga vetenskapsområdet, Mathematics and Computer Science, Department of Mathematics.
    Kulturens kraft2005In: Det matematiska kulturarvet, 2005, p. 71-74Chapter in book (Other scientific)
  • 21.
    Kiselman, Christer
    Uppsala University, Disciplinary Domain of Science and Technology, Mathematics and Computer Science, Department of Mathematics.
    La fondo de Akademio Comenius2001In: Eseoj memore al Ivo Lapenna, Kehlet, København , 2001Chapter in book (Other academic)
  • 22.
    Kiselman, Christer
    Uppsala University, Disciplinary Domain of Science and Technology, Mathematics and Computer Science, Department of Mathematics.
    La geometrio de la komputila ekrano2003In: Internacia Kongresa Universitato, Universala Esperanto-Asocio, Rotterdam , 2003, p. 1-12Chapter in book (Other (popular science, discussion, etc.))
  • 23.
    Kiselman, Christer
    Uppsala University, Disciplinary Domain of Science and Technology, Mathematics and Computer Science, Department of Mathematics.
    La sveda faklingvo en tekniko, matematiko kaj natursciencoj2001In: Studien zur Interlinguistik. Festschrift für Detlev Blanke zum 60. Geburtstag, Kava-Pech, Dobrichovice , 2001, p. 40-56Chapter in book (Other academic)
  • 24.
    Kiselman, Christer
    Uppsala University, Teknisk-naturvetenskapliga vetenskapsområdet, Mathematics and Computer Science, Department of Mathematics.
    Lectures on Geometry2001Report (Other scientific)
  • 25.
    Kiselman, Christer
    Uppsala University, Disciplinary Domain of Science and Technology, Mathematics and Computer Science, Department of Mathematics.
    Libereco de kreado estu homa rajto: Raporto de konferenco de UNESKO1998In: Esperanto, no 5, p. 85-Article in journal (Other (popular science, discussion, etc.))
  • 26.
    Kiselman, Christer
    Uppsala University, Teknisk-naturvetenskapliga vetenskapsområdet, Mathematics and Computer Science, Department of Mathematics.
    Matematikens två språk2005Report (Other scientific)
  • 27.
    Kiselman, Christer
    Uppsala University, Disciplinary Domain of Science and Technology, Mathematics and Computer Science, Department of Mathematics, Mathematics I -V.
    Minima locaux, fonctions marginales et hyperplans séparants dans l'optimisation discrète2008In: Comptes Rendus de l'Académie des Sciences Paris, Sér. I, Vol. 346, no 1-2, p. 49-52Article in journal (Refereed)
  • 28. Kiselman, Christer
    Normer finns för datum2002In: Dagens Nyheter: 2002-11-17Article in journal (Other (popular science, discussion, etc.))
  • 29.
    Kiselman, Christer
    Uppsala University, Teknisk-naturvetenskapliga vetenskapsområdet, Mathematics and Computer Science, Department of Mathematics.
    Opening address2004In: Educating for the Future. Proceedings of an International Symposium on Mathematics Teacher Education. Preparation of Mathematics Teachers for the Future: Malmö University, Sweden, 5–7 May 2003, The Royal Swedish Academy of Sciences, Stockholm , 2004Chapter in book (Other (popular scientific, debate etc.))
  • 30.
    Kiselman, Christer
    Uppsala University, Teknisk-naturvetenskapliga vetenskapsområdet, Mathematics and Computer Science, Department of Mathematics. Uppsala University, Teknisk-naturvetenskapliga vetenskapsområdet, Mathematics and Computer Science, Department of Mathematics, Mathematics I -V.
    Plurisubharmonic functions and their singularities1994In: Complex Potential Theory, Kluwer Academic Publishers , 1994, p. 273-323Chapter in book (Refereed)
  • 31.
    Kiselman, Christer
    Uppsala University, Teknisk-naturvetenskapliga vetenskapsområdet, Mathematics and Computer Science, Department of Mathematics. Uppsala University, Teknisk-naturvetenskapliga vetenskapsområdet, Mathematics and Computer Science, Department of Mathematics, Mathematics I -V.
    Recension av: Fractals, for the Classroom: Strategic Activities Volume One: av Heinz-Otto Peitgen, Harmut Jürgens, Dietmar Saupe, Evan Maletsky, Terry Perciante, Lee Yunker1993In: Elementa, Vol. 76, p. 44-Article, book review (Other scientific)
  • 32.
    Kiselman, Christer
    Uppsala University, Disciplinary Domain of Science and Technology, Mathematics and Computer Science, Department of Mathematics.
    Recenzo de: Enkonduko en la teorion de lingvaj ludoj. ^Cu mi lernu Esperanton?: de Reinhard Selten kaj Jonathan Pool1996In: Monato, no May, p. 20-Article, book review (Other (popular science, discussion, etc.))
  • 33.
    Kiselman, Christer
    Uppsala University, Disciplinary Domain of Science and Technology, Mathematics and Computer Science, Department of Mathematics.
    Recenzo de: Historio de la universala lingvo Volapuko: de Johann Schmidt, tradukita de Philippe Combot1996In: Monato, no August, p. 21-Article, book review (Other academic)
  • 34.
    Kiselman, Christer
    Uppsala University, Disciplinary Domain of Science and Technology, Mathematics and Computer Science, Department of Mathematics.
    Recenzo de: Konciza Gramatiko de Volapuko: de André Cherpillod1995In: Monato, no September, p. 23-Article, book review (Other academic)
  • 35.
    Kiselman, Christer
    Uppsala University, Teknisk-naturvetenskapliga vetenskapsområdet, Mathematics and Computer Science, Department of Mathematics. Matematik.
    Sam Svensson och Ormen Friske2004In: Vikingaskeppet Ormen Friskes undergång: Ett drama i det kalla krigets skugga, Södertörns Högskola, Huddinge , 2004, p. 273-291Chapter in book (Other scientific)
  • 36.
    Kiselman, Christer
    Uppsala University, Disciplinary Domain of Science and Technology, Mathematics and Computer Science, Department of Mathematics.
    Snöflingekurva på julpostfrimärke2000In: Akademinyheter, no 8, p. 3-Article in journal (Other academic)
  • 37.
    Kiselman, Christer
    Uppsala University, Teknisk-naturvetenskapliga vetenskapsområdet, Mathematics and Computer Science, Department of Mathematics. Uppsala University, Teknisk-naturvetenskapliga vetenskapsområdet, Mathematics and Computer Science, Department of Mathematics, Mathematics I -V.
    Subharmonic functions on discrete structures2005In: Harmonic Analysis, Signal Processing, and Complexity: Festschrift in Honor of the 60th Birthday of Carlos A. Berenstein., Birkhäuser , 2005, p. xi + 162-Chapter in book (Refereed)
  • 38.
    Kiselman, Christer
    Uppsala University, Disciplinary Domain of Science and Technology, Mathematics and Computer Science, Department of Mathematics.
    Suna eklipso 1999 08 111999In: Fonto, Vol. 19, no 227, p. 30-31Article in journal (Other (popular science, discussion, etc.))
  • 39.
    Kiselman, Christer
    Uppsala University, Teknisk-naturvetenskapliga vetenskapsområdet, Mathematics and Computer Science, Department of Mathematics.
    Svenskt fackspråk inom teknik, matematik och naturvetenskap2001In: Libens Merito: Festskrift till Stig Strömholm på 70-årsdagen 16 september 2001., 2001, p. 225-Chapter in book (Other scientific)
  • 40.
    Kiselman, Christer
    Uppsala University, Teknisk-naturvetenskapliga vetenskapsområdet, Mathematics and Computer Science, Department of Mathematics.
    Symposium on Communication Across Cultural Boundaries: Göteborg 20032005Conference proceedings (editor) (Refereed)
  • 41.
    Kiselman, Christer
    Uppsala University, Disciplinary Domain of Science and Technology, Mathematics and Computer Science, Department of Mathematics, Mathematics I -V.
    Transitivaj kaj netransitivaj verboj en Esperanto [Transitive and intransitive verbs in Esperanto]1995In: La stato kaj estonteco de la internacia lingvo Esperanto, Kava-Pech, Dobrichovice , 1995, p. 191-Chapter in book (Other academic)
  • 42.
    Kiselman, Christer
    Uppsala University, Disciplinary Domain of Science and Technology, Mathematics and Computer Science, Department of Mathematics.
    Vem bär ansvaret för byggfusk?2004In: Universen, no 6, p. 3-Article in journal (Other (popular science, discussion, etc.))
  • 43.
    Kiselman, Christer
    et al.
    Uppsala University, Disciplinary Domain of Science and Technology, Mathematics and Computer Science, Department of Information Technology, Division of Visual Information and Interaction. Uppsala University, Disciplinary Domain of Science and Technology, Mathematics and Computer Science, Department of Information Technology, Computerized Image Analysis and Human-Computer Interaction.
    Corsetti, RenatoDasgupta, Probal
    Aliroj al esperanto2018Collection (editor) (Other academic)
    Abstract [en]

    The book contains fourteen chapers on aspects of Esperanto: language, literature, culture, peace movement, history.

  • 44.
    Kiselman, Christer
    et al.
    Uppsala University, Teknisk-naturvetenskapliga vetenskapsområdet, Mathematics and Computer Science, Department of Mathematics. Uppsala University, Teknisk-naturvetenskapliga vetenskapsområdet, Mathematics and Computer Science, Department of Mathematics, Mathematics I -V. Earth Sciences, Department of Earth Sciences, Air and Water Science. Physics, Department of Physics and Materials Science, Theoretical Physics. Faculty of Science and Technology, Biology, Department of Cell and Molecular Biology, Microbiology.
    Halldin, Sven
    Uppsala University, Teknisk-naturvetenskapliga vetenskapsområdet, Mathematics and Computer Science, Department of Mathematics, Mathematics I -V. Earth Sciences, Department of Earth Sciences, Air and Water Science. Physics, Department of Physics and Materials Science, Theoretical Physics. Faculty of Science and Technology, Biology, Department of Cell and Molecular Biology, Microbiology.
    Danielsson, Ulf
    Department of Theoretical Physics. Uppsala University, Teknisk-naturvetenskapliga vetenskapsområdet, Mathematics and Computer Science, Department of Mathematics, Mathematics I -V. Earth Sciences, Department of Earth Sciences, Air and Water Science. Physics, Department of Physics and Materials Science, Theoretical Physics. Faculty of Science and Technology, Biology, Department of Cell and Molecular Biology, Microbiology.
    Carlson, Karin
    Uppsala University, Teknisk-naturvetenskapliga vetenskapsområdet, Mathematics and Computer Science, Department of Mathematics, Mathematics I -V. Earth Sciences, Department of Earth Sciences, Air and Water Science. Physics, Department of Physics and Materials Science, Theoretical Physics. Faculty of Science and Technology, Biology, Department of Cell and Molecular Biology, Microbiology.
    Mattsson, Amalia
    Rutberg, Martin
    "Svenska språket dör ut på landets universitet": DN - Debatt2005In: Dagens Nyheter, no 2005-06-17Article in journal (Other (popular scientific, debate etc.))
  • 45.
    Kiselman, Christer
    et al.
    Uppsala University.
    Mattos, Geraldo
    Lingva planado kaj leksikologio. Language Planning and Lexicology: Zagreb 20012001Conference proceedings (editor) (Refereed)
  • 46.
    Kiselman, Christer O.
    Uppsala University, Disciplinary Domain of Science and Technology, Mathematics and Computer Science, Department of Mathematics.
    Analytic continuation of fundamental solutions to differential equations with constant coefficients2011In: Annales de la Faculté des Sciences de Toulouse, Mathématiques, ISSN 0240-2963, Vol. (6) 20, no S2, p. 153-182Article in journal (Refereed)
    Abstract [en]

    If $P$ is a polynomial in ${\bf R}^n$ such that $1/P$ integrable, then the inverse Fourier transform of $1/P$ is a fundamental solution $E_P$ to the differential operator $P(D)$. The purpose of the article is to study the dependence of this fundamental solution on the polynomial $P$. For $n=1$ it is shown that $E_P$ can be analytically continued to a Riemann space over the set of all polynomials of the same degree as $P$. The singularities of this extension are studied.

  • 47.
    Kiselman, Christer O.
    Uppsala University, Disciplinary Domain of Science and Technology, Mathematics and Computer Science, Department of Mathematics.
    Characterizing digital straightness and digital convexity by means of difference operators2011In: Mathematika, ISSN 0025-5793, E-ISSN 2041-7942, Vol. 57, no 2, p. 355-380Article in journal (Refereed)
    Abstract [en]

    We characterize straightness of digital curves in the integer plane by means of difference operators. Earlier definitions of digital rectilinear segments have used, respectively, Rosenfeld’s chord property, word combinatorics, Reveillès’ double Diophantine inequalities, and the author’s refined hyperplanes. We prove that all these definitions are equivalent. We also characterize convexity of integer-valued functions on the integers with the help of difference operators.

  • 48.
    Kiselman, Christer O.
    Uppsala University, Disciplinary Domain of Science and Technology, Mathematics and Computer Science, Department of Mathematics.
    Characterizing digital straightness by means of difference operators2010In: Proceedings SSBA 2010. Symposium on Image Analysis, Uppsala, March 11—12, 2010. / [ed] Cris Luengo; Milan Gavrilovic, Uppsala, 2010, p. 15-18Conference paper (Refereed)
  • 49.
    Kiselman, Christer O.
    Uppsala University, Disciplinary Domain of Science and Technology, Mathematics and Computer Science, Department of Information Technology, Division of Visual Information and Interaction. Uppsala University, Disciplinary Domain of Science and Technology, Mathematics and Computer Science, Department of Information Technology, Computerized Image Analysis and Human-Computer Interaction.
    Domains of holomorphy for Fourier transforms of solutions to discrete convolution equations2017In: Science China Mathematics, ISSN 1674-7283, Vol. 60, no 6, p. 1005-1018Article in journal (Refereed)
    Abstract [en]

    We study solutions to convolution equations for functions with discrete support in Rn, a special case being functions with support in the integer points. The Fourier transform of a solution can be extended to a holomorphic function in some domains in Cn, and we determine possible domains in terms of the properties of the convolution operator.

  • 50.
    Kiselman, Christer O.
    Uppsala University, Disciplinary Domain of Science and Technology, Mathematics and Computer Science, Department of Information Technology, Division of Visual Information and Interaction. Uppsala University, Disciplinary Domain of Science and Technology, Mathematics and Computer Science, Department of Information Technology, Computerized Image Analysis and Human-Computer Interaction.
    Esperantologio / Esperanto Studies2015Collection (editor) (Refereed)
    Abstract [en]

    This issue contains five original studies, of which two are in Esperanto, two in English, and one in German. There is one review in Esperanto.

12 1 - 50 of 82
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