Zobrazeno 1 - 10
of 28
pro vyhledávání: '"B. I. Ptashnyk"'
Autor:
A. M. Kuz, B. I. Ptashnyk
Publikováno v:
Ukrainian Mathematical Journal. 69:621-645
In a domain obtained as a Cartesian product of an interval [0,T] and the space ℝ p , p ∈ ℕ, for a system of equations (with constant coefficients) unsolved with respect to the highest time derivative, we study the problem with integral conditio
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::ded468de54e45885ffa330b070e2f3eb
https://doi.org/10.1007/s11253-017-1385-8
https://doi.org/10.1007/s11253-017-1385-8
Autor:
S. M. Repetylo, B. I. Ptashnyk
Publikováno v:
Ukrainian Mathematical Journal. 68:756-776
In the domain obtained as the Cartesian product of a segment 0 ≤ t ≤ T by a p-dimensional torus in the variables x 1 ,…,x p , p ≥ 1, we study the problem with mixed boundary conditions in the variable t for general (no restrictions are impose
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::230aedd96a924875d05a5f6f412124e9
https://doi.org/10.1007/s11253-016-1256-8
https://doi.org/10.1007/s11253-016-1256-8
Autor:
B. I. Ptashnyk, A. M. Kuz
Publikováno v:
Ukrainian Mathematical Journal. 67:723-734
In a layer obtained as the Cartesian product of an interval [−T 1 ,T 2], T 1 ,T 2 > 0, and a space ℝ p , p ≥ 1, we study a problem with nonlocal condition in the time variable containing an integral term for a mixed parabolic-hyperbolic equatio
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::9b33c58178da95d2003865fe1d555a07
https://doi.org/10.1007/s11253-015-1110-4
https://doi.org/10.1007/s11253-015-1110-4
Autor:
B. I. Ptashnyk, I. R. Tymkiv
Publikováno v:
Ukrainian Mathematical Journal. 65:463-477
We establish conditions for the well-posedness of a problem with multipoint conditions in the time variable and some boundary conditions in the space coordinates posed for one class of parabolic equations with Bessel operator in one of the space vari
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::ea50ea7e09c8427cda6357d1460b0d61
https://doi.org/10.1007/s11253-013-0789-3
https://doi.org/10.1007/s11253-013-0789-3
Autor:
B. I. Ptashnyk, A. M. Kuz
Publikováno v:
Ukrainian Mathematical Journal. 65:277-293
In a domain specified in the form of a Cartesian product of a segment [0, T] and the space $ {{\mathbb{R}}^p} $ , we study a problem with integral conditions with respect to the time variable for Garding hyperbolic equations with constant coefficient
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::1ac7da35552f739d69b997c99bdb86f7
https://doi.org/10.1007/s11253-013-0777-7
https://doi.org/10.1007/s11253-013-0777-7
Autor:
I. R. Tymkiv, B. I. Ptashnyk
Publikováno v:
Nonlinear Oscillations. 12:346-357
We study the well-posedness of a problem for a Petrovskii-parabolic equation with coefficients depending on the space coordinates and with multipoint conditions with respect to the time variable. We establish conditions for the existence and uniquene
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::ad2c0a08f941ce6dd4f6c1ddb4f6210f
https://doi.org/10.1007/s11072-010-0081-5
https://doi.org/10.1007/s11072-010-0081-5
Autor:
B. I. Ptashnyk, I. Ya. Kmit
Publikováno v:
Ukrainian Mathematical Journal. 60:221-234
By using the method of characteristics, we investigate the well-posedness of local problems (Cauchy problem and mixed problems) and nonlocal problems (with nonseparable and integral conditions) for some multidimensional almost-linear hyperbolic syste
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::dd651b046a02753eaf0f9fc0e897ded5
https://doi.org/10.1007/s11253-008-0054-3
https://doi.org/10.1007/s11253-008-0054-3
Autor:
B. I. Ptashnyk, O. D. Vlasii
Publikováno v:
Ukrainian Mathematical Journal. 59:409-422
We study the well-posedness of the problem with general nonlocal boundary conditions in the time variable and conditions of periodicity in the space coordinates for partial differential equations unsolved with respect to the higher time derivative. W
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::b553f68e2668dad1970b640382a2a6b7
https://doi.org/10.1007/s11253-007-0026-z
https://doi.org/10.1007/s11253-007-0026-z
Autor:
B. I. Ptashnyk, V. S. Il’kiv
Publikováno v:
Ukrainian Mathematical Journal. 58:1847-1875
A survey of works of the authors and their disciples devoted to the investigation of problems with nonlocal conditions with respect to a selected variable in cylindrical domains is presented. These problems are considered for linear equations and sys
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::c25a885ae42c93ea838684e5cd445fdc
https://doi.org/10.1007/s11253-006-0172-8
https://doi.org/10.1007/s11253-006-0172-8
Autor:
B. I. Ptashnyk, V. S. Il’kiv
Publikováno v:
Siberian Mathematical Journal. 46:94-102
We study conditions for existence and uniqueness of a pseudosolution in a Sobolev space to a nonlocal two-point boundary-value problem for an indefinite type nonhomogeneous system of partial differential equations with continuous coefficients. We con
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::912d46faf5afd5ed481431b8b3d9219b
https://doi.org/10.1007/s11202-005-0010-5
https://doi.org/10.1007/s11202-005-0010-5