Zobrazeno 1 - 10
of 43
pro vyhledávání: '"T. Ya. Azizov"'
Publikováno v:
Linear Algebra and Its Applications, 439(3), 771-792
In this paper we generalize results from Stenger (1968) [30], Nudelman (2011) [28] and Azizov and Dijksma (2012) [7] to maximal dissipative and self-adjoint linear relations and discuss related results for nonnegative self-adjoint extensions of nonne
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::36a60b322e039e597ed33c755711204b
https://research.rug.nl/en/publications/8e7591e4-6bcc-4bef-bdd9-f9a758f5def1
https://research.rug.nl/en/publications/8e7591e4-6bcc-4bef-bdd9-f9a758f5def1
Autor:
Aad Dijksma, T. Ya. Azizov
Publikováno v:
Integral equations and operator theory, 74(2), 259-269. SPRINGER BASEL AG
We reprove and slightly improve theorems of Nudelman and Stenger about compressions of maximal dissipative and self-adjoint operators to subspaces of finite codimension and discuss related results concerning the closedness and the adjoint of a produc
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::b7cb9c9aaeb37331629a16dfaf1af4b8
https://research.rug.nl/en/publications/4da7487c-21d9-47e0-9564-6cb5fcd61c2f
https://research.rug.nl/en/publications/4da7487c-21d9-47e0-9564-6cb5fcd61c2f
Publikováno v:
Journal of the London Mathematical Society. 83:768-788
Spectral points of type …+ and type …i for closed linear operators and relations in Krein spaces are introduced with the help of approximative eigensequences. It turns out that these spectral points are stable under compact perturbations and pert
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::f3cb71248af4d4bf6b232c9fc22bfb07
https://doi.org/10.1112/jlms/jdq098
https://doi.org/10.1112/jlms/jdq098
Autor:
M. V. Chugunova, T. Ya. Azizov
Publikováno v:
Mathematical Notes. 86:612-624
The main result of the present paper is the use of Pontryagin’s theorem for proving a criterion, based on the difference in the number of negative eigenvalues between two self-adjoint operators L− and L+, for the linear part of a Hamiltonian syst
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::47bc7c91d03bc96f9dc042fa42da3713
https://doi.org/10.1134/s0001434609110029
https://doi.org/10.1134/s0001434609110029
Autor:
Peter Jonas, T. Ya. Azizov
Publikováno v:
Functional Analysis and Its Applications. 41:169-180
We study analytic properties of special classes of matrix functions (locally definitizable and locally Nevanlinna functions) by methods of operator theory. The aim of this paper is to prove that if G(λ) is a locally definitizable or locally generali
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::a9b5acc22cbbd83005af60c166a3ece5
https://doi.org/10.1007/s10688-007-0015-x
https://doi.org/10.1007/s10688-007-0015-x
Publikováno v:
Monatshefte fur mathematik, 138(1), 1-29. SPRINGER WIEN
In the first paper of this series (Daniel Alpay, Tomas Azizov, Aad Dijksma, and Heinz Langer: The Schur algorithm for generalized Schur functions I: coisometric realizations, Operator Theory: Advances and Applications 129 (2001), pp. 1-36) it was sho
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::f4c849a13f986ce2ac7b1265c88f57f6
https://doi.org/10.1007/S00605-002-0528-6
https://doi.org/10.1007/S00605-002-0528-6
Publikováno v:
American Mathematical Society Translations: Series 2. :1-24
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::3141a4c8c1b2ee0acbe3490c6a4e7d2e
https://doi.org/10.1090/trans2/199/01
https://doi.org/10.1090/trans2/199/01
Autor:
A. I. Barsukov, T. Ya. Azizov
Publikováno v:
Mathematical Notes. 63:145-149
We study properties of Jordan representations ofH-dissipative operators in a finite-dimensional indefiniteH-space. An algebraic proof is given of the fact that such operators always have maximal semidefinite invariant subspaces.
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::f7d71adef3f37519a0a29434be1a0590
https://doi.org/10.1007/bf02308753
https://doi.org/10.1007/bf02308753
Autor:
T. Ya. Azizov, V. L. Khatskevich
Publikováno v:
Mathematical Notes. 55:549-554
D(A) with respect to the seminorm ([A[x, x) 1/2 (x E D(A)). Let A0 and A1 be closed symmetric operators with D[A0] C H and D[A1] C H, and let [., "]0 and [., "]1 be extensions by continuity (on the possibility of such an extension see Proposition 2 b
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::79e28a807a62bba2ba4af9b8accc38cd
https://doi.org/10.1007/bf02110348
https://doi.org/10.1007/bf02110348
Publikováno v:
Mathematical Notes. 69:429-431
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::37db4357c75dd6c140162e93d8633ad7
https://doi.org/10.1023/a:1010247828142
https://doi.org/10.1023/a:1010247828142