Title | An index formula in a class of groupoid $C^*$-algebras |
Publication Type | Journal Article |
Year of Publication | 2021 |
Authors | Bujukliev N |
Journal | Annuaire de l’Université de Sofia “St. Kliment Ohridski”. Faculté de Mathématiques et Informatique |
Volume | 108 |
Start Page | 23 |
Pagination | 23-28 |
ISSN | 1313-9215 (Print) 2603-5529 (Online) |
Keywords | groupoid algebras, index formula |
Abstract | We consider the groupoid $C^*$-algebra $\mathcal{T} = C^*(\mathcal{G})$, where the groupoid $\mathcal{G}$ is a reduction of a transformation group $\mathcal{G} = (Y \times G)|X$, and $Y$ and $X$ are suitable topological spaces. We impose additional constraints on a cross-section $\psi$, which gives opportunity to define cyclic 1-cocycle and to obtain a formula that calculates the index of the Fredholm operators. |
DOI | 10.60063/GSU.FMI.108.23-28 |
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108-23-28.pdf | 472.89 KB |