3 papers
math.OA2016
Operational extreme points of unital completely positive maps
Marie Choda
Two notions for linear maps (operational convex combinations and operational exetreme points) are introduced. The set S of ucp maps on the n times n matrix algebra is the operation…
math.OA2008
Relative entropy for maximal abelian subalgebras of matrices and the entropy of unistochastic matrices
Marie Choda
Let and be two maximal abelian *-subalgebras of the complex matrices To study the movement of the inner automorphisms of w…
math.OA1999
Purely infinite, simple C*-algebras arising from free product constructions, III
Marie Choda, Ken Dykema
In the reduced free product of C*-algebras (A,phi)=(A_1,phi_1)*(A_2,phi_2), A is shown to be purely infinite and simple under the hypothesis that A_1 is the crossed product of a C*…