15 citations · 74 across the 21 of their papers we have counts for
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math.FA2006
Nagy-Foias type functional models of nondissipative operators in parabolic domains
Dmitry V. Yakubovich
A functional model for nondissipative unbounded perturbations of an unbounded self-adjoint operator on a Hilbert space X is constructed. This model is analogous to the Nagy--Foias…
math.FA2006
Vector semi-Fredholm Toeplitz operators and mean winding numbers
Dmitry V. Yakubovich
For a continuous complex-valued function g on the real line without zeros, several notions of a mean winding number are introduced. We give necessary conditions for a Toeplitz oper…