TY - BOOK AU - Borceux Francis TI - Handbook of categorical algebra - 3 : : categories of sheaves T2 - Encyclopedia of Mathematics and its Applications SN - 9780521061247 AV - QA169 PY - 1994///] CY - New York PB - Cambridge University Press N1 - Introduction to this handbook 1 - Locales 2 - Sheaves 3 - Grothendieck toposes 4 - The classifying topos 5 - Elementary toposes 6 - Internal logic of a topos 7 - The law of excluded middle 8 - The axiom of infinity 9 - Sheaves in a topos N2 - 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. --- summary provided by publisher ER -