139 citations · 140 across the 8 of their papers we have counts for
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math.FA2002
k-hyponormality of powers of weighted shifts via Schur products
Raul E. Curto, Sang Soo Park
We characterize -hyponormality and quadratic hyponormality of powers of weighted shifts using Schur product techniques.
math.FA2002
A duality proof of Tchakaloff's theorem
Raul E. Curto, Lawrence A. Fialkow
Tchakaloff's Theorem establishes the existence of a quadrature rule of prescribed degree relative to a positive, compactly supported measure that is absolutely continuous with resp…
math.FA2002
Weyl's theorem, a-Weyl's theorem, and local spectral theory
Raul E. Curto, Young Min Han
We give necessary and sufficient conditions for a Banach space operator with the single valued extension property (SVEP) to satisfy Weyl's theorem and -Weyl's theorem. We show t…