Vectorial form of Ekeland-type variational principle in locally convex spaces and its applications.
Verallgemeinerte konvexe Funktionen.
Verification of functional a posteriori error estimates for obstacle problem in 1D
We verify functional a posteriori error estimate for obstacle problem proposed by Repin. Simplification into 1D allows for the construction of a nonlinear benchmark for which an exact solution of the obstacle problem can be derived. Quality of a numerical approximation obtained by the finite element method is compared with the exact solution and the error of approximation is bounded from above by a majorant error estimate. The sharpness of the majorant error estimate is discussed.
Verification of functional a posteriori error estimates for obstacle problem in 2D
We verify functional a posteriori error estimates proposed by S. Repin for a class of obstacle problems in two space dimensions. New benchmarks with known analytical solution are constructed based on one dimensional benchmark introduced by P. Harasim and J. Valdman. Numerical approximation of the solution of the obstacle problem is obtained by the finite element method using bilinear elements on a rectangular mesh. Error of the approximation is measured by a functional majorant. The majorant value...
Vers un théorème de Skorohod simultané
Nous étudions un théorème de Skorohod pour des mesures vectorielles à valeurs . En notant la mesure image de par la variable aléatoire nous donnons des classes de mesures et éventuel-lement de variables telles que, si la suite converge étroitement, il existe une suite qui converge en mesure, éventuel-lement p.s.Le problème de Monge est abordé comme application. Soit la mesure variation de , pour un couple et une fonction coût le problème de Monge est l’existence d’une fonction...
Vertical blow ups of capillary surfaces in . I: Convex corners.
Vertical blow ups of capillary surfaces in . II: Nonconvex corners.
Vertical developments of a convex function.
Verzweigungspunkte von H-Flächen. I.
Verzweigungspunkte von H-Flächen. II .
Viability and generalized differential quotients
Viability and invariance for differential games with applications to Hamilton-Jacobi-Isaacs equations
Viability, invariance and reachability for controlled piecewise deterministic Markov processes associated to gene networks
We aim at characterizing viability, invariance and some reachability properties of controlled piecewise deterministic Markov processes (PDMPs). Using analytical methods from the theory of viscosity solutions, we establish criteria for viability and invariance in terms of the first order normal cone. We also investigate reachability of arbitrary open sets. The method is based on viscosity techniques and duality for some associated linearized problem. The theoretical results are applied to general...
Viability, invariance and reachability for controlled piecewise deterministic Markov processes associated to gene networks
We aim at characterizing viability, invariance and some reachability properties of controlled piecewise deterministic Markov processes (PDMPs). Using analytical methods from the theory of viscosity solutions, we establish criteria for viability and invariance in terms of the first order normal cone. We also investigate reachability of arbitrary open sets. The method is based on viscosity techniques and duality for some associated linearized problem. The theoretical results are applied to general...
Viability, invariance and reachability for controlled piecewise deterministic Markov processes associated to gene networks
We aim at characterizing viability, invariance and some reachability properties of controlled piecewise deterministic Markov processes (PDMPs). Using analytical methods from the theory of viscosity solutions, we establish criteria for viability and invariance in terms of the first order normal cone. We also investigate reachability of arbitrary open sets. The method is based on viscosity techniques and duality for some associated linearized problem. The theoretical results are applied to general...
Viscosity solutions for an optimal control problem with Preisach hysteresis nonlinearities
We study a finite horizon problem for a system whose evolution is governed by a controlled ordinary differential equation, which takes also account of a hysteretic component: namely, the output of a Preisach operator of hysteresis. We derive a discontinuous infinite dimensional Hamilton–Jacobi equation and prove that, under fairly general hypotheses, the value function is the unique bounded and uniformly continuous viscosity solution of the corresponding Cauchy problem.
Viscosity solutions for an optimal control problem with Preisach hysteresis nonlinearities
We study a finite horizon problem for a system whose evolution is governed by a controlled ordinary differential equation, which takes also account of a hysteretic component: namely, the output of a Preisach operator of hysteresis. We derive a discontinuous infinite dimensional Hamilton–Jacobi equation and prove that, under fairly general hypotheses, the value function is the unique bounded and uniformly continuous viscosity solution of the corresponding Cauchy problem.
Viscosity solutions methods for converse KAM theory
The main objective of this paper is to prove new necessary conditions to the existence of KAM tori. To do so, we develop a set of explicit a-priori estimates for smooth solutions of Hamilton-Jacobi equations, using a combination of methods from viscosity solutions, KAM and Aubry-Mather theories. These estimates are valid in any space dimension, and can be checked numerically to detect gaps between KAM tori and Aubry-Mather sets. We apply these results to detect non-integrable regions in several...
Viscosity solutions of elliptic partial differential equations.
Viscosity solutions of fully nonlinear functional parabolic PDE.