Výsledky vyhledávání - "N. D. Kopachevsky"

To the Problem on Small Motions of the System of Two Viscoelastic Fluids in a Fixed Vessel

Autor: N D Kopachevsky

Publikováno v: Contemporary Mathematics. Fundamental Directions. 64:547-572

In this paper, we study the problem of small motions of two Oldroyd viscoelastic incompressible ﬂuids contained in a ﬁxed vessel. By means of the operator approach, we reduce the original initialboundary value problem to the Cauchy problem for a

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::a16aaa34698005c406699d8068bf73bc
https://doi.org/10.22363/2413-3639-2018-64-3-547-572

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Small Motions of an Ideal Stratiﬁed Fluid in a Basin Covered with Ice

Autor: D O Tsvetkov, N D Kopachevsky

Publikováno v: Contemporary Mathematics. Fundamental Directions. 64:573-590

We study the problem on small motions of an ideal stratiﬁed ﬂuid with a free surface partially covered with crushed ice. The crushed ice is supposed to be ponderable particles of some matter ﬂoating on the free surface. These particles do not i

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::6f6bed4100326d74786a1da8d374c919
https://doi.org/10.22363/2413-3639-2018-64-3-573-590

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On Oscillations of Two Connected Pendulums Containing Cavities Partially Filled with Incompressible Fluid

Autor: V I Voytitsky, Z. Z. Sitshaeva, N D Kopachevsky

Publikováno v: Contemporary Mathematics. Fundamental Directions. 63:627-677

We consider the linearized problem on small oscillations of two pendulums connected to each other with a spherical hinge. Each pendulum has a cavity partially ﬁlled with incompressible ﬂuid. We study the initial-boundary value problem as well as

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::3f45125c3743d8d41a62ca91a09475b8
https://doi.org/10.22363/2413-3639-2017-63-4-627-677

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Abstract Green Formulas for Triples of Hilbert Spaces and Sesquilinear Forms

Autor: N. D. Kopachevsky

Publikováno v: Journal of Mathematical Sciences. 225:226-264

In this paper, under several general assumptions, we deduce an abstract Green formula for a triple of Hilbert spaces and an (abstract) trace operator and a similar formula corresponding to sesquilinear forms. We establish existence conditions for the

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::19befb6f92e226d3503c08657d51f97a
https://doi.org/10.1007/s10958-017-3470-9

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