92 citations
- Czech Academy of Sciences, Institute of MathematicsCZ4 papers
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math.OA2005★ 5 cited
Characteristic functions for multicontractions and automorphisms of the unit ball
Chafiq Benhida, Dan Timotin
A \emph{multicontraction} on a Hilbert space $\HH$ is an -tuple of operators acting on $\HH$, such that $\sum_{i=1}^n T_i T_i^*\le \1_\HH$. We obtain some resu…
math.OA2005
Amenability, completely bounded projections, dynamical systems and smooth orbits
Daniel Beltiţă, Bebe Prunaru
We describe a general method to construct completely bounded idempotent mappings on operator spaces, starting from amenable semigroups of completely bounded mappings. We then explo…