174 citations · 478 across the 30 of their papers we have counts for
Showing 1998 · math.OAShow all
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math.OA1998★ 1 cited
Normal conditional expectations of finite index and sets of modular generators
Michael Frank
Normal conditional expectations E: M --> N in M of finite index on von Neumann algebras M with discrete center are investigated to find an estimate for the minimal number of genera…
math.OA1998★ 42 cited
On conditional expectations of finite index
M. Frank, E. Kirchberg
For a conditional expectation E on a (unital) C*-algebra A there exists a real number K>=1 such that the mapping (K.E-id_A) is positive if and only if there exists a real number L>…