A Groupoid Approach to Luck's Amenability Conjecture

We prove that amenability of a discrete group is equivalent to dimension flatness of certain ring inclusions naturally associated with measure preserving actions of the group. This provides a group-measure space theoretic solution to a conjecture of Luck stating that amenability of a group is characterized by dimension flatness of the inclusion of its complex group algebra into the associated von Neumann algebra.


Published in:
Osaka Journal Of Mathematics, 51, 4, 905-934
Year:
2014
Publisher:
Toyonaka, Osaka Journal Of Mathematics
ISSN:
0030-6126
Laboratories:




 Record created 2015-02-20, last modified 2018-09-13


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