Zobrazeno 1 - 10
of 25
pro vyhledávání: '"Hendrik S. V. de Snoo"'
Presented in this volume are a number of new results concerning the extension theory and spectral theory of unbounded operators using the recent notions of boundary triplets and boundary relations. This approach relies on linear single-valued and mul
Publikováno v:
Proceedings of the royal society of edinburgh section a-Mathematics, 144(4), 731-745
The theory of closed sesquilinear forms in the non-semi-bounded situation exhibits some new features, as opposed to the semi-bounded situation. In particular, there can be more than one closed form associated with the generalized Friedrichs extension
Autor:
Hendrik S. V. de Snoo
Publikováno v:
Mathematische Nachrichten. 182:99-126
In this note we consider regular Sturm-Liouville equations with a floating singularity of a special type: the coefficient of the second order derivative contains the eigenvalue parameter. We determine the form of the boundary conditions which make th
Autor:
Hendrik S. V. de Snoo, Damir Z. Arov, Seppo Hassi, Mikael Kurula, Olof J. Staffans, Franciszek Hugon Szafraniec
Publikováno v:
Operator Methods for Boundary Value Problems
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::e305e9b8c04e1734a73698cfe4144af3
https://doi.org/10.1017/cbo9781139135061.006
https://doi.org/10.1017/cbo9781139135061.006
John Williams Calkin (October 11, 1909-August 5, 1964). A native of New Rochelle, N.Y., he graduated with honors in mathematics from Columbia University in 1933. He was awarded his MA in 1934 and his PhD in June 1937 by Harvard University. His PhD di
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::5c6221e2f1763b9670140a8085b6a5d1
https://doi.org/10.1017/cbo9781139135061.002
https://doi.org/10.1017/cbo9781139135061.002
Publikováno v:
Operator Methods for Boundary Value Problems
Presented in this volume are a number of new results concerning the extension theory and spectral theory of unbounded operators using the recent notions of boundary triplets and boundary relations. This approach relies on linear single-valued and mul
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::c0df7019c6196375a00f672a19591b22
https://doi.org/10.1017/cbo9781139135061
https://doi.org/10.1017/cbo9781139135061
Publikováno v:
Operator Theory in Inner Product Spaces, 175, 51-88
Operator Theory in Inner Product Spaces ISBN: 9783764382698
Operator Theory in Inner Product Spaces ISBN: 9783764382698
Asymptotic expansions of generalized Nevanlinna functions Q are investigated by means of a factorization model involving a part of the generalized zeros and poles of nonpositive type of the function Q. The main results in this paper arise from the ex
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::4e5d2fee0be3c05f840c7db392cb7edb
https://hdl.handle.net/11370/8df66f14-d905-4aa8-90a8-88bc105f6575
https://hdl.handle.net/11370/8df66f14-d905-4aa8-90a8-88bc105f6575
Publikováno v:
Schur Functions, Operator Colligations, and Reproducing Kernel Pontryagin Spaces ISBN: 9783034898232
Special reproducing kernel Pontryagin spaces arise as the state spaces ℌ(S), ℌ(\( \widetilde{S} \) ), and D(S) of certain coisometric, isometric, and unitary colligations V with characteristic function S(z) = ΘV (z) (§2.1). The realization prob
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::2622c8e936a0e3cae674079ac6fc2b8f
https://doi.org/10.1007/978-3-0348-8908-7_2
https://doi.org/10.1007/978-3-0348-8908-7_2
Publikováno v:
Schur Functions, Operator Colligations, and Reproducing Kernel Pontryagin Spaces ISBN: 9783034898232
The spaces ℌ(S), ℌ(\( \widetilde{S} \) ), and D(S) defined in Chapter 2 have many special properties when S(z) belongs to S K (F,B). Invariance under the difference-quotient transformation and an inequality characterize spaces of the form ℌ(S)
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::fa396c2f484710689006e247548f4aad
https://doi.org/10.1007/978-3-0348-8908-7_3
https://doi.org/10.1007/978-3-0348-8908-7_3
Publikováno v:
Schur Functions, Operator Colligations, and Reproducing Kernel Pontryagin Spaces ISBN: 9783034898232
After a review of reproducing kernel Pontryagin spaces, it is shown in §1.1 that a holomorphic kernel has the same number of negative squares for every region of analyticity. Background on colligations and their characteristic functions is presented
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::2cadd4bf36a821992e1a79a4cf0a78a0
https://doi.org/10.1007/978-3-0348-8908-7_1
https://doi.org/10.1007/978-3-0348-8908-7_1