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Lie theoretic significance of the measure topologies associated with a finite trace

  • Daniel Beltiţă
Published/Copyright: March 29, 2010
Forum Mathematicum
From the journal Volume 22 Issue 2

Abstract

Let ℳ be a W*-algebra with a faithful normal finite trace and think of the unitary group U endowed with the ultraweak topology. By using the measure topology associated with the aforementioned trace, we prove that U is a topological group with Lie algebra in the sense of K.H. Hofmann and S.A. Morris (J. Group Theory 8: 115–133, 2005). We discuss the corresponding exponential map and find that it is never locally injective in the case of factors of type II1.

Received: 2008-04-15
Accepted: 2008-05-27
Published Online: 2010-03-29
Published in Print: 2010-March

© de Gruyter 2010

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