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Search: MSC category 47A45 ( Canonical models for contractions and nonselfadjoint operators )

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1. CJM 2013 (vol 67 pp. 132)

Clouâtre, Raphaël
 Unitary Equivalence and Similarity to Jordan Models for Weak Contractions of Class \$C_0\$ We obtain results on the unitary equivalence of weak contractions of class \$C_0\$ to their Jordan models under an assumption on their commutants. In particular, our work addresses the case of arbitrary finite multiplicity. The main tool is the theory of boundary representations due to Arveson. We also generalize and improve previously known results concerning unitary equivalence and similarity to Jordan models when the minimal function is a Blaschke product. Keywords:weak contractions, operators of class \$C_0\$, Jordan model, unitary equivalenceCategories:47A45, 47L55

2. CJM 1999 (vol 51 pp. 850)

Muhly, Paul S.; Solel, Baruch
 Tensor Algebras, Induced Representations, and the Wold Decomposition Our objective in this sequel to \cite{MSp96a} is to develop extensions, to representations of tensor algebras over \$C^{*}\$-correspondences, of two fundamental facts about isometries on Hilbert space: The Wold decomposition theorem and Beurling's theorem, and to apply these to the analysis of the invariant subspace structure of certain subalgebras of Cuntz-Krieger algebras. Keywords:tensor algebras, correspondence, induced representation, Wold decomposition, Beurling's theoremCategories:46L05, 46L40, 46L89, 47D15, 47D25, 46M10, 46M99, 47A20, 47A45, 47B35