Completely bounded kernels
Operator Algebras
2012-12-17 v3 Functional Analysis
Abstract
We introduce completely bounded kernels taking values in L(A,B) where A and B are C*-algebras. We show that if B is injective such kernels have a Kolmogorov decomposition precisely when they can be scaled to be completely contractive, and that this is automatic when the index set is countable.
Cite
@article{arxiv.1001.3590,
title = {Completely bounded kernels},
author = {Tirthankar Bhattacharyya and Michael A. Dritschel and Christopher S. Todd},
journal= {arXiv preprint arXiv:1001.3590},
year = {2012}
}
Comments
22 pages. Fixed oversight in previous version. To appear in Acta Scientiarum Mathematicarum (Szeged) for the 100th anniversary of the birth of Bela Sz.-Nagy