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From Objects to Diagrams for Ranges of Functors

  • Book
  • © 2011

Overview

  • The book is centered on two statements: namely, CLL, and its main precursor, the Armature Lemma, which are results of category theory, with hard proofs, which appear here for the first time. Most of the book is aimed at applications outside category theory, and is thus written as a toolbox.
  • The results of the book illustrate how certain representation problems have counterexamples of different cardinalities such as aleph zero, one, two, and explain why.
  • CLL and the Armature Lemma have a wide application range, which we illustrate with examples in lattice theory, universal algebra, and ring theory. We also give pointers to solutions, made possible by our results, to previously intractable representation problems, with respect to various functors.

Part of the book series: Lecture Notes in Mathematics (LNM, volume 2029)

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Table of contents (7 chapters)

Keywords

About this book

This work introduces tools, from the field of category theory, that make it possible to tackle until now unsolvable representation problems (determination of the range of a given functor). The basic idea is: if a functor lifts many objects, then it also lifts many (poset-indexed) diagrams.

Authors and Affiliations

  • Department of Mathematics, Charles University in Prague, Prague, Czech Republic

    Pierre Gillibert

  • Department of Mathematics, University of Caen, LMNO, CNRS UMR 6139, Caen, Cedex, France

    Friedrich Wehrung

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