Extrapolation at Stiff Differential Equations.
Extrapolation methods to solve non-autonomous retarded partial differential equations
Using extrapolation spaces introduced by Da Prato-Grisvard and Nagel we prove a non-autonomous perturbation theorem for Hille-Yosida operators. The abstract result is applied to non-autonomous retarded partial differential equations.
Extrapolation of finite element solutions on non-uniform quadrilateral meshes
Extrapolation with spline-collocation methods for two-point boundary-value problems II: C2-cubics.
Extrapolation with spline-collocation methods for two-point boundary value problems I: Proposals and justifications.
Extrapolation with spline-collocation methods for two-point boundary value problems I: Proposals and justifications. (Short Communication).
Extremal properties of distance-based graph invariants for -trees
Sharp bounds on some distance-based graph invariants of -vertex -trees are established in a unified approach, which may be viewed as the weighted Wiener index or weighted Harary index. The main techniques used in this paper are graph transformations and mathematical induction. Our results demonstrate that among -trees with vertices the extremal graphs with the maximal and the second maximal reciprocal sum-degree distance are coincident with graphs having the maximal and the second maximal reciprocal...
Extremal properties of eigenvalues for a metric graph
We establish the sharp lower bound for eigenvalues of a metric graph.
Extremal property of the equation
Extremal selections of multifunctions generating a continuous flow
Let be a continuous multifunction with compact, not necessarily convex values. In this paper, we prove that, if F satisfies the following Lipschitz Selection Property: (LSP) For every t,x, every y ∈ c̅o̅F(t,x) and ε > 0, there exists a Lipschitz selection ϕ of c̅o̅F, defined on a neighborhood of (t,x), with |ϕ(t,x)-y| < ε, then there exists a measurable selection f of ext F such that, for every x₀, the Cauchy problem ẋ(t) = f(t,x(t)), x(0) = x₀, has a unique Carathéodory solution, depending...
Extremal solutions and relaxation for second order vector differential inclusions
In this paper we consider periodic and Dirichlet problems for second order vector differential inclusions. First we show the existence of extremal solutions of the periodic problem (i.e. solutions moving through the extreme points of the multifunction). Then for the Dirichlet problem we show that the extremal solutions are dense in the -norm in the set of solutions of the “convex” problem (relaxation theorem).
Extremal solutions and strong relaxation for second order multivalued boundary value problems
In this paper we study semilinear second order differential inclusions involving a multivalued maximal monotone operator. Using notions and techniques from the nonlinear operator theory and from multivalued analysis, we obtain “extremal” solutions and we prove a strong relaxation theorem.
Extremal Solutions for a Class of Functional Differential Equations
We study, in Carathéodory assumptions, existence, continuation and continuous dependence of extremal solutions for an abstract and rather general class of hereditary differential equations. By some examples we prove that, unlike the nonfunctional case, solved Cauchy problems for hereditary differential equations may not have local extremal solutions.
Extremal solutions of periodic boundary value problems for first-order impulsive integrodifferential equations of mixed-type on time scales.
Extremal solutions to a class of multivalued integral equations in Banach space.
Extremality results for singular functional diffusion equations
Factoring linear differential operators on measure chains.
Factorisation d'opérateurs différentiels à coefficients dans une extension liouvillienne d'un corps valué
On démontre ici un lemme de Hensel pour les opérateurs différentiels. On en déduit un théorème de factorisation pour des opérateurs différentiels à coefficients dans une extension liouvillienne transcendante d’un corps valué. On obtient en particulier un théorème de factorisation pour des opérateurs différentiels à coefficients dans une extension de par un nombre fini d’exponentielles et de logarithmes algébriquement indépendants sur .
Factorisation d'un opérateur différentiel
Factorisation d'un opérateur différentiel. Applications