Topos Theory

Topos Theory

Author: P.T. Johnstone

Publisher: Courier Corporation

Published: 2014-01-15

Total Pages: 401

ISBN-13: 0486493369

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Focusing on topos theory's integration of geometric and logical ideas into the foundations of mathematics and theoretical computer science, this volume explores internal category theory, topologies and sheaves, geometric morphisms, and other subjects. 1977 edition.


Higher Topos Theory

Higher Topos Theory

Author: Jacob Lurie

Publisher: Princeton University Press

Published: 2009-07-26

Total Pages: 944

ISBN-13: 0691140480

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In 'Higher Topos Theory', Jacob Lurie presents the foundations of this theory using the language of weak Kan complexes introduced by Boardman and Vogt, and shows how existing theorems in algebraic topology can be reformulated and generalized in the theory's new language.


Toposes and Local Set Theories

Toposes and Local Set Theories

Author: John L. Bell

Publisher: Courier Corporation

Published: 2008-01-01

Total Pages: 290

ISBN-13: 0486462862

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This text introduces topos theory, a development in category theory that unites important but seemingly diverse notions from algebraic geometry, set theory, and intuitionistic logic. Topics include local set theories, fundamental properties of toposes, sheaves, local-valued sets, and natural and real numbers in local set theories. 1988 edition.


Sheaves in Geometry and Logic

Sheaves in Geometry and Logic

Author: Saunders Mac Lane

Publisher:

Published: 1992

Total Pages: 627

ISBN-13: 9783540977100

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An introduction to the theory of toposes which begins with illustrative examples and goes on to explain the underlying ideas of topology and sheaf theory as well as the general theory of elementary toposes and geometric morphisms and their relation to logic.


The Topos of Music

The Topos of Music

Author: Guerino Mazzola

Publisher: Birkhäuser

Published: 2012-12-06

Total Pages: 1310

ISBN-13: 303488141X

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With contributions by numerous experts


Topoi

Topoi

Author: R. Goldblatt

Publisher: Elsevier

Published: 2014-06-28

Total Pages: 569

ISBN-13: 148329921X

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The first of its kind, this book presents a widely accessible exposition of topos theory, aimed at the philosopher-logician as well as the mathematician. It is suitable for individual study or use in class at the graduate level (it includes 500 exercises). It begins with a fully motivated introduction to category theory itself, moving always from the particular example to the abstract concept. It then introduces the notion of elementary topos, with a wide range of examples and goes on to develop its theory in depth, and to elicit in detail its relationship to Kripke's intuitionistic semantics, models of classical set theory and the conceptual framework of sheaf theory (``localization'' of truth). Of particular interest is a Dedekind-cuts style construction of number systems in topoi, leading to a model of the intuitionistic continuum in which a ``Dedekind-real'' becomes represented as a ``continuously-variable classical real number''.The second edition contains a new chapter, entitled Logical Geometry, which introduces the reader to the theory of geometric morphisms of Grothendieck topoi, and its model-theoretic rendering by Makkai and Reyes. The aim of this chapter is to explain why Deligne's theorem about the existence of points of coherent topoi is equivalent to the classical Completeness theorem for ``geometric'' first-order formulae.


Basic Category Theory

Basic Category Theory

Author: Tom Leinster

Publisher: Cambridge University Press

Published: 2014-07-24

Total Pages: 193

ISBN-13: 1107044243

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A short introduction ideal for students learning category theory for the first time.


Theories, Sites, Toposes

Theories, Sites, Toposes

Author: Olivia Caramello

Publisher: Oxford University Press

Published: 2018

Total Pages: 381

ISBN-13: 019875891X

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According to Grothendieck, the notion of topos is "the bed or deep river where come to be married geometry and algebra, topology and arithmetic, mathematical logic and category theory, the world of the continuous and that of discontinuous or discrete structures". It is what he had "conceived of most broad to perceive with finesse, by the same language rich of geometric resonances, an "essence" which is common to situations most distant from each other, coming from one region or another of the vast universe of mathematical things". The aim of this book is to present a theory and a number of techniques which allow to give substance to Grothendieck's vision by building on the notion of classifying topos educed by categorical logicians. Mathematical theories (formalized within first-order logic) give rise to geometric objects called sites; the passage from sites to their associated toposes embodies the passage from the logical presentation of theories to their mathematical content, i.e. from syntax to semantics. The essential ambiguity given by the fact that any topos is associated in general with an infinite number of theories or different sites allows to study the relations between different theories, and hence the theories themselves, by using toposes as 'bridges' between these different presentations. The expression or calculation of invariants of toposes in terms of the theories associated with them or their sites of definition generates a great number of results and notions varying according to the different types of presentation, giving rise to a veritable mathematical morphogenesis.


Categories for the Working Mathematician

Categories for the Working Mathematician

Author: Saunders Mac Lane

Publisher: Springer Science & Business Media

Published: 2013-04-17

Total Pages: 320

ISBN-13: 1475747217

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An array of general ideas useful in a wide variety of fields. Starting from the foundations, this book illuminates the concepts of category, functor, natural transformation, and duality. It then turns to adjoint functors, which provide a description of universal constructions, an analysis of the representations of functors by sets of morphisms, and a means of manipulating direct and inverse limits. These categorical concepts are extensively illustrated in the remaining chapters, which include many applications of the basic existence theorem for adjoint functors. The categories of algebraic systems are constructed from certain adjoint-like data and characterised by Beck's theorem. After considering a variety of applications, the book continues with the construction and exploitation of Kan extensions. This second edition includes a number of revisions and additions, including new chapters on topics of active interest: symmetric monoidal categories and braided monoidal categories, and the coherence theorems for them, as well as 2-categories and the higher dimensional categories which have recently come into prominence.