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  • Open Daily: 10am - 10pm
    Alley-side Pickup: 10am - 7pm

    3038 Hennepin Ave Minneapolis, MN
    612-822-4611

Open Daily: 10am - 10pm | Alley-side Pickup: 10am - 7pm
3038 Hennepin Ave Minneapolis, MN
612-822-4611
Characterizing Groupoid C*-Algebras of Non-Hausdorff Étale Groupoids

Characterizing Groupoid C*-Algebras of Non-Hausdorff Étale Groupoids

Exel, Ruy
Pitts, David R.

Paperback

Series: Lecture Notes in Mathematics, Book 2306

AlgebraGeneral Mathematics

ISBN10: 3031055128
ISBN13: 9783031055126
Publisher: Springer Nature
Published: Oct 20 2022
Pages: 158
Weight: 0.54
Height: 0.36 Width: 6.14 Depth: 9.21
Language: English

This book develops tools to handle C*-algebras arising as completions of convolution algebras of sections of line bundles over possibly non-Hausdorff groupoids. A fundamental result of Gelfand describes commutative C*-algebras as continuous functions on locally compact Hausdorff spaces.

Kumjian, and later Renault, showed that Gelfand's result can be extended to include non-commutative C*-algebras containing a commutative C*-algebra. In their setting, the C*-algebras in question may be described as the completion of convolution algebras of functions on twisted Hausdorff groupoids with respect to a certain norm. However, there are many natural settings in which the Kumjian-Renault theory does not apply, in part because the groupoids which arise are not Hausdorff. In fact, non-Hausdorff groupoids have been a source of surprising counterexamples and technical difficulties for decades. Including numerous illustrative examples, this book extends the Kumjian-Renault theory toa much broader class of C*-algebras.

This work will be of interest to researchers and graduate students in the area of groupoid C*-algebras, the interface between dynamical systems and C*-algebras, and related fields.

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