Tensor Products and Regularity Properties of Cuntz Semigroups

Released on by Ramon Antoine
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  • Tensor Products and Regularity Properties of Cuntz Semigroups Book Detail

  • Author : Ramon Antoine
  • Release Date : 2018-02-23
  • Publisher : American Mathematical Soc.
  • Genre : Mathematics
  • Pages : 206
  • ISBN 13 : 1470427974
  • File Size : 34,34 MB
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Tensor Products and Regularity Properties of Cuntz Semigroups by Ramon Antoine PDF Summary

Book Description: The Cuntz semigroup of a -algebra is an important invariant in the structure and classification theory of -algebras. It captures more information than -theory but is often more delicate to handle. The authors systematically study the lattice and category theoretic aspects of Cuntz semigroups. Given a -algebra , its (concrete) Cuntz semigroup is an object in the category of (abstract) Cuntz semigroups, as introduced by Coward, Elliott and Ivanescu. To clarify the distinction between concrete and abstract Cuntz semigroups, the authors call the latter -semigroups. The authors establish the existence of tensor products in the category and study the basic properties of this construction. They show that is a symmetric, monoidal category and relate with for certain classes of -algebras. As a main tool for their approach the authors introduce the category of pre-completed Cuntz semigroups. They show that is a full, reflective subcategory of . One can then easily deduce properties of from respective properties of , for example the existence of tensor products and inductive limits. The advantage is that constructions in are much easier since the objects are purely algebraic.

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