Adam Sørensen (Kopenhagen): Equivariant Semiprojectivity. Oberseminar C*-Algebren.
Tuesday, 27.11.2012 15:15 im Raum N2
Abstract
Semiprojectivity is a lifting property for C*-algebras that has proved
useful in the classification program. Phillips has recently introduced an
equivariant version of semiprojectivity, and given many examples of
semiprojective actions by compact groups. We will discuss the relations
between semiprojectivity with and without a group action. For instance, we
will see that if a compact group acts semiprojectively on a C*-algebra A,
than A must be (ordinarily) semiprojective, and that there is a
semiprojective action of the group of integers on a non-semiprojective
C*-algebra.
This is joint work with N. Christopher Phillips and Hannes Thiel.
Angelegt am 22.10.2012 von Elke Enning
Geändert am 22.10.2012 von Elke Enning
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