Mathematics – Group Theory
Scientific paper
2010-05-13
Mathematics
Group Theory
AMSLaTeX, 10 pages, to appear in Amer J Math
Scientific paper
We compute the von Neumann dimensions of the kernels of adjacency operators
on free lamplighter groups and show that they are irrational, thus providing an
elementary constructive answer to a question of Atiyah.
Lehner Franz
Wagner Stephan
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