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Quasi-invariant lifts of completely positive maps for groupoid actions

Authors :
Bhattacharjee, Suvrajit
Forough, Marzieh
Publication Year :
2024

Abstract

Let $G$ be a locally compact, $\sigma$-compact, Hausdorff groupoid and $A$ be a separable, $C_0(G^{(0)})$-nuclear, $G$-$C^*$-algebra. We prove the existence of quasi-invariant, completely positive and contractive lifts for equivariant, completely positive and contractive maps from $A$ into a separable, quotient $C^*$-algebra. Along the way, we construct the Busby invariant for $G$-actions.<br />Comment: Preliminary version

Subjects

Subjects :
Mathematics - Operator Algebras

Details

Database :
arXiv
Publication Type :
Report
Accession number :
edsarx.2405.07859
Document Type :
Working Paper