Results 41 to 50 of about 8,289 (116)

Functional characteristic initial value problems

Journal of Mathematical Analysis and Applications, 1985
The authors study the hyperbolic equations with delays \(\sigma\) and \(\tau\) of the form \[ u_{xy}\pm f(x,y,u(x-\sigma,y-\tau))=0, \] with characteristic initial data \(u(x,y)=\phi (x,y)\) if \(-\sigma \leq ...
Georgiou, D, Kreith, K
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The Dirichlet problem for a mixed-type equation with strong characteristic degeneracy and a singular coefficient

Vestnik Samarskogo Gosudarstvennogo Tehničeskogo Universiteta. Seriâ: Fiziko-Matematičeskie Nauki, 2017
In this paper we consider the first boundary value problem in a rectangular area for a mixed-type equation of the second kind with a singular coefficient. The criterion of the uniqueness of the problem solution is determined.
Rimma M Safina
doaj   +1 more source

Characteristic Evolution and Matching

Living Reviews in Relativity, 2012
I review the development of numerical evolution codes for general relativity based upon the characteristic initial-value problem. Progress in characteristic evolution is traced from the early stage of 1D feasibility studies to 2D-axisymmetric codes that ...
Jeffrey Winicour
doaj  

Problem of Selection of Lubricants for ethelene High-Pressure Compressors. 2.Characteristic of object of investigation

Фізика і хімія твердого тіла, 2019
Technology of obtaining and properties of ethylene compositions with different content of oils inside is researched. Study antifriction properties of naphtene and polyglicol oils.
H. O. Sirenko, M. I. Martynyuk, V. P. Svidersky, N. V. Shmaltser, O. V. Kuzyshyn   +4 more
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Characteristic Evolution and Matching

Living Reviews in Relativity, 2009
I review the development of numerical evolution codes for general relativity based upon the characteristic initial value problem. Progress is traced from the early stage of 1D feasibility studies to 2D axisymmetric codes that accurately simulate the ...
Winicour Jeffrey
doaj  

Problem with Conjugation on the Characteristic Plane for One 3D Space Analogue of Hyperbolic Type Equation

Vestnik Samarskogo Gosudarstvennogo Tehničeskogo Universiteta. Seriâ: Fiziko-Matematičeskie Nauki, 2010
The value boundary problem with conjugation together on the characteristic plane in the special class, entered by authors, is solved for the one 3D space analogue of the hyperbolic type equation in the area, which parts of border are the planes of ...
I. N. Rodionova, V. M. Dolgopolov
doaj   +1 more source

On solvability of a nonlocal problem with integral conditions for hyperbolic equation in characteristic domain

Вестник Самарского университета: Естественнонаучная серия
In this article, we study a nonlocal problem for hyperbolic equation in characteristic domain. Additional information on desired solution is given in the form of integrals.
L. S. Pulkina, A. N. Smirnova
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Solving a characteristic Cauchy problem

, 2008
23 pages; no ...
Allaud, Emmanuel, Devoue, Victor
openaire   +2 more sources

A comparison between characteristic lines and streamline upwind Petrov-Galerkin method for advection dominated problems

Revista Facultad de Ingeniería Universidad de Antioquia, 2013
This article develops numerically the advection-diffusion equation problem, using Galerkin on characteristic lines and Streamline Upwind Petrov-Galerkin (SUPG) methods. The dominated advective conditions in the solved problem showed that for cases where
Carlos Humberto Galeano, Diego Alexander Garzón, Juan Miguel Mantilla   +2 more
doaj  

The construction problem for Hodge numbers modulo an integer in positive characteristic—ERRATUM

Forum of Mathematics, Sigma, 2021
Remy van Dobben de Bruyn, Matthias Paulsen   +1 more
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