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Understanding the Small Object Argument
Uppsala University, Disciplinary Domain of Science and Technology, Mathematics and Computer Science, Department of Mathematics.
2009 (English)In: Applied Categorical Structures, ISSN 0927-2852, E-ISSN 1572-9095, Vol. 17, no 3, 247-285 p.Article in journal (Refereed) Published
Abstract [en]

The small object argument is a transfinite construction which, starting from a set of maps in a category, generates a weak factorisation system on that category. As useful as it is, the small object argument has some problematic aspects: it possesses no universal property; it does not converge; and it does not seem to be related to other transfinite constructions occurring in categorical algebra. In this paper, we give an "algebraic" refinement of the small object argument, cast in terms of Grandis and Tholen's natural weak factorisation systems, which rectifies each of these three deficiencies.

Place, publisher, year, edition, pages
2009. Vol. 17, no 3, 247-285 p.
Keyword [en]
Weak factorisation system, Small object argument
National Category
URN: urn:nbn:se:uu:diva-129046DOI: 10.1007/s10485-008-9137-4ISI: 000266372000002OAI: oai:DiVA.org:uu-129046DiVA: diva2:337499
Available from: 2010-08-06 Created: 2010-08-05 Last updated: 2010-08-06Bibliographically approved

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