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  • © 2011

From Objects to Diagrams for Ranges of Functors

  • 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)

  1. Front Matter

    Pages i-x
  2. Background

    • Pierre Gillibert, Friedrich Wehrung
    Pages 1-34
  3. Boolean Algebras That Are Scaled with Respect to a Poset

    • Pierre Gillibert, Friedrich Wehrung
    Pages 35-50
  4. The Condensate Lifting Lemma (CLL)

    • Pierre Gillibert, Friedrich Wehrung
    Pages 51-79
  5. Getting Larders from Congruence Lattices of First-Order Structures

    • Pierre Gillibert, Friedrich Wehrung
    Pages 81-116
  6. Congruence-Permutable, Congruence-Preserving Extensions of Lattices

    • Pierre Gillibert, Friedrich Wehrung
    Pages 117-129
  7. Larders from Von Neumann Regular Rings

    • Pierre Gillibert, Friedrich Wehrung
    Pages 131-138
  8. Discussion

    • Pierre Gillibert, Friedrich Wehrung
    Pages 139-141
  9. Back Matter

    Pages 143-158

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

Bibliographic Information

Buy it now

Buying options

eBook USD 34.99
Price excludes VAT (USA)
  • Available as PDF
  • Read on any device
  • Instant download
  • Own it forever
Softcover Book USD 44.99
Price excludes VAT (USA)
  • Compact, lightweight edition
  • Dispatched in 3 to 5 business days
  • Free shipping worldwide - see info

Tax calculation will be finalised at checkout

Other ways to access