Results 1 to 10 of about 2,955,080 (287)
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 +2 more sources
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 +2 more sources
Frontiers in Psychology, 2015 Mental arithmetic is a powerful paradigm to study problem solving using neuroimaging methods. However, the evaluation of task complexity varies significantly across neuroimaging studies.
Nadja eTschentscher, Olaf eHauk
doaj +1 more source
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
openaire +1 more source
On the solvability of the Sturm – Liouville problem, nonlinear in the spectral parameter
Известия высших учебных заведений. Поволжский регион: Физико-математические наукиBackground. The paper studies the solvability of the Sturm-Liouville problem, which is nonlinear in the spectral parameter. The problem is studied on a segment with boundary conditions of the third kind. Materials and methods.
G.V. Chalyshov
doaj +1 more source
Oscillatory solutions of the Cauchy problem for linear differential equations
Electronic Journal of Differential Equations, 2015 We consider the Cauchy problem for second and third order linear differential equations with constant complex coefficients. We describe necessary and sufficient conditions on the data for the existence of oscillatory solutions. It is known that in the
Gro Hovhannisyan, Oliver Ruff
doaj
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
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 +4 more
doaj +1 more source
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
Vestnik Samarskogo Gosudarstvennogo Tehničeskogo Universiteta. Seriâ: Fiziko-Matematičeskie Nauki, 2013 The boundary value problem with data given on the parallel characteristics for the system of hyperbolic equations with the wave operator and the singular matrix coefficient at the lower derivative is considered in the characteristic square.
Rina Rinatovna Rayanova
doaj +1 more source