26 citations · 36 across the 12 of their papers we have counts for
Showing 2009Show all
2 papers · 1 filter
math.OA2009
Non-K-exact uniform Roe C*-algebras
Jan Spakula
We prove that uniform Roe C*-algebras associated to some expander graphs coming from discrete groups with property (τ) are not K-exact. In particular, we show that this is the case…
math.FA2009★ 1 cited
Uniform version of Weyl-von Neumann theorem
Jan Spakula
We prove a "quantified" version of the Weyl-von Neumann theorem, more precisely, we estimate the ranks of approximants to compact operators appearing in the Voiculescu's theorem ap…