3 citations · 3 across the 6 of their papers we have counts for
6 papers
Unitary boundary pairs for isometric operators in Pontryagin spaces and generalized coresolvents
D. Baidiuk, V. Derkach, S. Hassi
An isometric operator V in a Pontryagin space H is called standard, if its domain and the range are nondegenerate subspaces in H. A description of coresolvents for standard isometr…
Robustness of polynomial stability of damped wave equations
D. Baidiuk, L. Paunonen
In this paper we present new results on the preservation of polynomial stability of damped wave equations under addition of perturbing terms. We in particular introduce sufficient…
Completion and extension of operators in Kre\uın spaces
D. Baidiuk
A generalization of the well-known results of M.G. Kre\uın about the description of selfadjoint contractive extension of a hermitian contraction is obtained. This generalization co…
Generalized resolvents of isometric operators in Pontryagin spaces
Dmytro Baidiuk
An isometric operator in a Pontryagin space is called standard, if its domain and the range are nondegenerate subspaces in . Generalized resolvents o…
Completion, extension, factorization, and lifting of operators with a negative index
D. Baidiuk, S. Hassi
The famous results of M.G. Kre\uın concerning the description of selfadjoint contractive extensions of a Hermitian contraction and the characterization of all nonnegative sel…
Abstract interpolation problem in generalized Schur classes
D. Baidiuk
An indefinite variant of the abstract interpolation problem is considered. Associated to this problem is a model Pontryagin space isometric operator V. All the solutions of the pro…