Handbook of Categorical Algebra: Volume 3, Sheaf Theory Paperback / softback

by Francis (Universite Catholique de Louvain, Belgium) Borceux

Part of the Encyclopedia of Mathematics and its Applications series

Paperback / softback

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The Handbook of Categorical Algebra is intended to give, in three volumes, a rather detailed account of what, ideally, everybody working in category theory should know, whatever the specific topic of research they have chosen.

The book is planned also to serve as a reference book for both specialists in the field and all those using category theory as a tool.

Volume 3 begins with the essential aspects of the theory of locales, proceeding to a study in chapter 2 of the sheaves on a locale and on a topological space, in their various equivalent presentations: functors, etale maps or W-sets.

Next, this situation is generalized to the case of sheaves on a site and the corresponding notion of Grothendieck topos is introduced.

Chapter 4 relates the theory of Grothendieck toposes with that of accessible categories and sketches, by proving the existence of a classifying topos for all coherent theories.