Zobrazeno 1 - 10
of 102
pro vyhledávání: '"Boris Vainberg"'
Autor:
Yuri A. Godin, Boris Vainberg
Publikováno v:
Waves in Random and Complex Media. 32:1150-1173
We consider the propagation of acoustic time-harmonic waves in a homogeneous media containing periodic lattices of spherical or cylindrical inclusions. It is assumed that the wavelength has the order of the periods of the lattice while the radius $a$
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::f4ad294dd11fd0e1bd6426d418baa014
https://doi.org/10.1080/17455030.2020.1810822
https://doi.org/10.1080/17455030.2020.1810822
Autor:
Boris Vainberg, Rajan Puri
Publikováno v:
Applicable Analysis. 101:108-117
We consider exterior elliptic problems with coefficients stabilizing at infinity and study the critical value βcr of the coupling constant (the coefficient at the potential) that separates operator...
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::dbd4f69c8e2bd67e7faa84d8979453be
https://doi.org/10.1080/00036811.2020.1731478
https://doi.org/10.1080/00036811.2020.1731478
We consider the discrete Schr\"odinger operator $H=-\Delta+V$ with a sparse potential $V$ and find conditions guaranteeing either existence of wave operators for the pair $H$ and $H_0=-\Delta$, or presence of dense purely point spectrum of the operat
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::1fc98f104ca75d2166912a8385835484
http://arxiv.org/abs/2110.08684
http://arxiv.org/abs/2110.08684
We consider a mean-field model of a polymer with a spherically-symmetric finitely supported potential. We describe how the typical size of the polymer depends on the two parameters: the temperature, which approaches the critical value, and the length
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::083ecd0c3f0fd846bd80867494632e37
http://arxiv.org/abs/2008.04493
http://arxiv.org/abs/2008.04493
Publikováno v:
Journal of Functional Analysis. 273:1020-1048
We study spectral properties of convolution operators L and their perturbations H = L + v(x) by compactly supported potentials. Results are applied to determine the front propagation of a population density governed by operator H with a compactly sup
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::b140afac71f6fd860e89d79285e6d749
https://doi.org/10.1016/j.jfa.2017.04.006
https://doi.org/10.1016/j.jfa.2017.04.006
Autor:
Boris Vainberg, Evgeny Lakshtanov
Publikováno v:
Repositório Científico de Acesso Aberto de Portugal
Repositório Científico de Acesso Aberto de Portugal (RCAAP)
instacron:RCAAP
Repositório Científico de Acesso Aberto de Portugal (RCAAP)
instacron:RCAAP
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Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::36c4778554f2affa18dd2960ef805979
https://doi.org/10.1134/s0040577917010068
https://doi.org/10.1134/s0040577917010068
Publikováno v:
Teoreticheskaya i Matematicheskaya Fizika. 190:87-103
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::bfc0e78e2e9ef2a9dec41db08fd5fc9d
https://doi.org/10.4213/tmf9056
https://doi.org/10.4213/tmf9056
Alexander (Sasha) Gordon, died in Chicago on May 13, 2019, after a long illness. Sasha was a brilliant mathematician, author of a number of beautiful and original results in diverse fields of spectral theory and other areas of analysis. His insights
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::47a5c941c0a74379f2373d5da5a2557a
https://resolver.caltech.edu/CaltechAUTHORS:20200108-134330154
https://resolver.caltech.edu/CaltechAUTHORS:20200108-134330154
Publikováno v:
Repositório Científico de Acesso Aberto de Portugal
Repositório Científico de Acesso Aberto de Portugal (RCAAP)
instacron:RCAAP
Repositório Científico de Acesso Aberto de Portugal (RCAAP)
instacron:RCAAP
Existence of a spectral singularity (SS) in the spectrum of {a Schr\"{o}dinger operator with} a non-Hermitian potential requires exact matching of parameters of the potential. We provide a necessary and sufficient condition for a potential to have a
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::c97f4cf670b6c3ed74cd853db10611cd
http://arxiv.org/abs/1812.05499
http://arxiv.org/abs/1812.05499