Zobrazeno 1 - 10
of 110
pro vyhledávání: '"P. I. Kalenyuk"'
Autor:
I. Kalenyuk, L. Tsymbal
Publikováno v:
Фінансово-кредитна діяльність: проблеми теорії та практики, Vol 3, Iss 34 (2020)
Abstract. The engine for the development of countries is the accumulation and use of intellectual resources. At the same time, there is considerable scientific interest in the question of which intellectual factors are key to ensuring the development
Externí odkaz:
https://doaj.org/article/9efba69bb9914e6e9214e5760fbc989f
Autor:
P. I. Kalenyuk, Ya.O. Baranetskij
Publikováno v:
Journal of Mathematical Sciences. 256:375-397
For a partial differential equation of order 2n with constant coefficients in the domain G := {x = (x1,…, xm) : 0 < xj < 1 < ∞, j = 1,…, m, m ϵ ℕ} , we study the problem with conditions that are multipoint perturbations of the Dirichlet boun
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::7e32534b686d0a58b1cdcd67da01d99e
https://doi.org/10.1007/s10958-021-05433-z
https://doi.org/10.1007/s10958-021-05433-z
Publikováno v:
Matematychni Studii. 54:64-78
The spectral properties of the nonself-adjoint problem with multipoint perturbations of the Dirichlet conditions for differential operator of order $2n$ with involution are investigated. The system of eigenfunctions of a multipoint problem is constru
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::d23a1e99c48c812d2fa86589c1099bed
https://doi.org/10.30970/ms.54.1.64-78
https://doi.org/10.30970/ms.54.1.64-78
Publikováno v:
Carpathian Mathematical Publications. 12:173-188
In this paper we continue to investigate the properties of the problem with nonlocal conditions, which are multipoint perturbations of mixed boundary conditions, started in the first part. In particular, we construct a generalized transform operator,
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::2c4f128d6768b19cb039e7801b106d3c
https://doi.org/10.15330/cmp.12.1.173-188
https://doi.org/10.15330/cmp.12.1.173-188
Autor:
P. I. Kalenyuk, Ya.O. Baranetskij
Publikováno v:
Journal of Mathematical Sciences. 246:152-169
We study the spectral properties of a nonself-adjoint problem for a (2n )th order differentiation operator with nonlocal conditions obtained as perturbations of regular but not strongly regular conditions and generalizing the periodicity conditions.
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::0a401576fc880397473beb309afb02f7
https://doi.org/10.1007/s10958-020-04727-y
https://doi.org/10.1007/s10958-020-04727-y
Publikováno v:
Journal of Mathematical Sciences. 246:170-187
We study the problem with three-point conditions with respect to the time for a homogeneous partial differential equation in a plane domain. It is shown that the problem is well-posed in Hadamard's sense. This distinguishes the analyzed problem from
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::eafddeeb31b305a66f5b7448b40ae9de
https://doi.org/10.1007/s10958-020-04728-x
https://doi.org/10.1007/s10958-020-04728-x
Publikováno v:
Matematychni Metody Ta Fizyko-Mekhanichni Polya. 63
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::4d84c5b6c0c3bbf79a87003d7f882b4c
https://doi.org/10.15407/mmpmf2020.63.1.21-36
https://doi.org/10.15407/mmpmf2020.63.1.21-36
Publikováno v:
Ukrainian Mathematical Journal. 70:851-865
We study spectral properties of an essentially nonself-adjoint problem generated by nonlocal multipoint conditions for the operator of differentiation of order 2n and analyze the cases of regular and irregular Birkhoff two-point boundary conditions.
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::3560a454bbd03e7f8c1e38a6486aa48f
https://doi.org/10.1007/s11253-018-1538-4
https://doi.org/10.1007/s11253-018-1538-4
Akademický článek
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Publikováno v:
Karpatsʹkì Matematičnì Publìkacìï, Vol 9, Iss 2, Pp 109-119 (2018)
In this paper, the problem with boundary nonself-adjoint conditions for a differential-operator equations of the order $2n$ with involution is studied. Spectral properties of operator of the problem is investigated. By analogy of separation of variab
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::d2e11baf8ba8e0acc510303cbc2f993f
https://doi.org/10.15330/cmp.9.2.109-119
https://doi.org/10.15330/cmp.9.2.109-119