Mathematics – Operator Algebras
Scientific paper
2003-10-08
J.reine angew. Math. 561 (2003), 87-129
Mathematics
Operator Algebras
37 pages, Section 6 slightly improved
Scientific paper
In this paper we study the operator inequality \phi(X)\leq X and the operator equation \phi(X)= X, where \phi is a w^*-continuous positive (resp. completely positive) linear map on B(H). We show that their solutions are in one-to-one correspondence with a class of Poisson transforms on Cuntz-Toeplitz C^*-algebras, if \phi is completely positive. Canonical decompositions, ergodic type theorems, and lifting theorems are obtained and used to provide a complete description of all solutions, when \phi(I)\leq I. We show that the above-mentioned inequality (resp. equation) and the structure of its solutions have strong implications in connection with representations of Cuntz-Toeplitz C^*-algebras, common invariant subspaces for n-tuples of operators, similarity of positive linear maps, and numerical invariants associated with Hilbert modules over \CF_n^+, the complex free semigroup algebra generated by the free semigroup on n generators.
No associations
LandOfFree
Similarity and ergodic theory of positive linear maps does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.
If you have personal experience with Similarity and ergodic theory of positive linear maps, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Similarity and ergodic theory of positive linear maps will most certainly appreciate the feedback.
Profile ID: LFWR-SCP-O-640935