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Quasi-C-Ehresmann Semigroups and Their Subclasses

โœ Scribed by Gang Li; Y.Q. Guo; K.P. Shum

Publisher
Springer
Year
2005
Tongue
English
Weight
438 KB
Volume
70
Category
Article
ISSN
0037-1912

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Actions of semigroups on directed graphs
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โœ David Pask; Iain Raeburn; Trent Yeend ๐Ÿ“‚ Article ๐Ÿ“… 2001 ๐Ÿ› Elsevier Science ๐ŸŒ English โš– 172 KB

A free action of a group G on a row-รฟnite directed graph E induces an action \* on its Cuntz-Krieger C \* -algebra C \* (E), and a recent theorem of Kumjian and Pask says that the crossed product C \* (E) ร— \* G is stably isomorphic to the C \* -algebra C \* (E=G) of the quotient graph. We prove an