Zobrazeno 1 - 10
of 38
pro vyhledávání: '"Oleg Safronov"'
Publikováno v:
Environmental Problems, Vol 8, Iss 1, Pp 1-7 (2023)
The paper shows the possibility of efficiently using oilseed production and processing waste. The methods of chemical transformation of by-products of oil and fat production into technological systems for sustainable development have been developed.
Externí odkaz:
https://doaj.org/article/824e758ce0af4da898796a65b9e744a2
Autor:
Oleg Safronov
Publikováno v:
Annales Henri Poincaré. 23:1883-1907
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::fba8bb27a9bebe1b21a3690d1b226ad9
https://doi.org/10.1007/s00023-021-01141-1
https://doi.org/10.1007/s00023-021-01141-1
Publikováno v:
Eastern-European Journal of Enterprise Technologies, Vol 4, Iss 6 (106), Pp 54-60 (2020)
The possibility of using the wastes of the oil and fat industry – phosphatide concentrates as components of lubricating materials was demonstrated in this paper. At the first stage, amidation of phosphatide concentrate from the purification of rape
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::8a0e6f66fe8d1c9255c2badbf364516a
https://doi.org/10.15587/1729-4061.2020.210043
https://doi.org/10.15587/1729-4061.2020.210043
Autor:
Oleg Safronov, Alexander Y. Gordon
Publikováno v:
Reports on Mathematical Physics. 85:427-442
We derive the Simon–Wolff localization criterion from the spectral averaging using an intuitive measure-theoretic lemma.
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::7513e280211b15e39c4b592432c67947
https://doi.org/10.1016/s0034-4877(20)30045-8
https://doi.org/10.1016/s0034-4877(20)30045-8
Autor:
Oleg Safronov
Publikováno v:
Journal of Mathematical Physics. 63:121506
Let [ λ, μ] be an interval contained in a spectral gap of a periodic Schrödinger operator H. Consider H( α) = H − αV, where V is a fast decaying positive function. We study the asymptotic behavior of the number of eigenvalues of H( α) in [ λ
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::dffe48454e077656319fe7d6486af3fa
https://doi.org/10.1063/5.0107147
https://doi.org/10.1063/5.0107147
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
Autor:
Oleg Safronov
Publikováno v:
Partial Differential Equations, Spectral Theory, and Mathematical Physics
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::45f0572f07602ee99046bb6270abaebc
https://doi.org/10.4171/ecr/18-1/21
https://doi.org/10.4171/ecr/18-1/21
Publikováno v:
Letters in Mathematical Physics. 107:1799-1807
We study the spectral properties of pairs of operators $$-\Delta \pm V$$ and show that if their negative spectra are discrete, then their essential spectra fill the positive semi-axis. Analogous statements are proved for more general operators of the
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::c1ee47e3f8a92dbc0c5ee2d132ad2fb5
https://doi.org/10.1007/s11005-017-0970-y
https://doi.org/10.1007/s11005-017-0970-y
Autor:
Oleg Safronov
Publikováno v:
Annales Henri Poincaré. 18:1385-1434
We consider different Dirac operators with either electric or magnetic potentials satisfying conditions guaranteeing their decay at infinity. We prove that the absolutely continuous spectra of these operators cover the intervals \((-\infty ,-1]\) and
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::878f2b67101ba58edb756931b23b88e9
https://doi.org/10.1007/s00023-017-0553-6
https://doi.org/10.1007/s00023-017-0553-6
Autor:
Oleg Safronov
Publikováno v:
Applicable Analysis. 96:375-395
We consider a family of elliptic operators depending on a real parameter and prove that the a.c. spectrum covers the half-line for almost every value of .
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::6b817f62136d6f1a3650eaaa643448eb
https://doi.org/10.1080/00036811.2015.1137098
https://doi.org/10.1080/00036811.2015.1137098