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Operator positivity and analytic models of commuting tuples of operators

Monojit BhattacharjeeJaydeb Sarkar — 2016

Studia Mathematica

We study analytic models of operators of class C · 0 with natural positivity assumptions. In particular, we prove that for an m-hypercontraction T C · 0 on a Hilbert space , there exist Hilbert spaces and ⁎ and a partially isometric multiplier θ ∈ ℳ (H²(),A²ₘ(⁎)) such that θ = A ² ( ) θ H ² ( ) and T P θ M z | θ , where A²ₘ(⁎) is the ⁎-valued weighted Bergman space and H²() is the -valued Hardy space over the unit disc . We then proceed to study analytic models for doubly commuting n-tuples of operators and investigate their applications...

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