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- W79359978 abstract "Adhesive categories are a class of categories in which pushouts along monos are well-behaved with respect to pullbacks. Recently it has been shown that any topos is adhesive. Many examples of interest to computer scientists are not adhesive, a fact which motivated the introduction of quasiadhesive categories. We show that several of these examples arise via a glueing construction which yields quasitoposes. We show that, surprisingly, not all such quasitoposes are quasiadhesive and characterise precisely those which are by giving a succinct necessary and sufficient condition on the lattice of subobjects." @default.
- W79359978 created "2016-06-24" @default.
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- W79359978 date "2007-01-01" @default.
- W79359978 modified "2023-09-23" @default.
- W79359978 title "Quasitoposes, quasiadhesive categories and Artin glueing" @default.
- W79359978 hasPublicationYear "2007" @default.
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