Localized endomorphisms of graph algebras

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Date

Volume

2011-04

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Journal

Series Titel

Oberwolfach Preprints (OWP)

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Publisher

Oberwolfach : Mathematisches Forschungsinstitut Oberwolfach

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Abstract

Endomorphisms of graph C*-algebras are investigated. A combinatorial ap- proach to analysis of permutative endomorphisms is developed. Then invertibility criteria for localized endomorphisms are given. Furthermore, proper endomor- phisms which restrict to automorphisms of the canonical diagonal MASA are analyzed. The Weyl group and the restricted Weyl group of a graph C*-algebra are introduced and investigated. Criteria of outerness for automorphisms in the restricted Weyl group are found.

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