75 citations · 178 across the 28 of their papers we have counts for
30 papers
Bilinear forms, Schur multipliers, complete boundedness and duality
Erik Christensen
Grothendieck's inequalities for operators and bilinear forms imply some factorization results for complex m x n matrices. Based on the theory of operator spaces and completely boun…
Norm optimal factorizations of scalar and block matrices
Erik Christensen
For an complex matrix of rank with Schur multiplier we show that there exist an complex matrix and an complex matrix …
Minimal Stinespring Representations of Operator Valued Multilinear Maps
Erik Christensen
A completely positive linear map from a C*-algebra into has a Stinespring representation as where is a *-representation of on a Hilbert sp…
C*-dynamical rapid decay
Erik Christensen
Some well known results by Haagerup, Jolissaint and de la Harpe may be extended to the setting of a reduced crossed product of a C*-algebra A by a discrete group We show that…
Unbounded expectations to some von Neumann algebras
Erik Christensen
For any injective von Neumann algebra R and any discrete, countable group G, which acts by *-automorphisms on R, we construct an idempotent mapping of an ultra-weakly dense subspac…
The Hadamard product in a crossed product C*-algebra
Erik Christensen
We show that for a C*-algebra A and a discrete group G with an action of G on A, the reduced crossed product C*-algebra possesses a natural generalization of the convolution produc…