-estimates for nonlinear parabolic equations with natural growth conditions
-estimates for solutions of nonlinear parabolic systems with gradient linear growth
Existence of weak solutions and an -estimate are shown for nonlinear nondegenerate parabolic systems with linear growth conditions with respect to the gradient. The -estimate is proved for equations with coefficients continuous with respect to x and t in the general main part, and for diagonal systems with coefficients satisfying the Carathéodory condition.
Laplace asymptotics for generalized K.P.P. equation
Consider a one dimensional nonlinear reaction-diffusion equation (KPP equation) with non-homogeneous second order term, discontinuous initial condition and small parameter. For points ahead of the Freidlin-KPP front, the solution tends to 0 and we obtain sharp asymptotics (i.e. non logarithmic). Our study follows the work of Ben Arous and Rouault who solved this problem in the homogeneous case. Our proof is probabilistic, and is based on the Feynman-Kac formula and the large deviation principle...
Laplace asymptotics for generalized K.P.P. equation
Large solutions, metasolutions, and asymptotic behaviour of the regular positive solutions of sublinear parabolic problems.
Local exact controllability of the diffusion equation in one dimension.
Local exact lagrangian controllability of the Burgers viscous equation
Local Existence and Regularity for a Class of Degenerate Parabolic Equations.
Local solution for the Kadomtsev-Petviashvili equation with periodic conditions.
Local solvability of diagonal semilinear parabolic systems
Long-time behavior for a regularized scalar conservation law in the absence of genuine nonlinearity
Long-time vanishing properties of solutions of some semilinear parabolic equations
Malliavin method for optimal investment in financial markets with memory
We consider a financial market with memory effects in which wealth processes are driven by mean-field stochastic Volterra equations. In this financial market, the classical dynamic programming method can not be used to study the optimal investment problem, because the solution of mean-field stochastic Volterra equation is not a Markov process. In this paper, a new method through Malliavin calculus introduced in [1], can be used to obtain the optimal investment in a Volterra type financial market....
Mathematical analysis of the discharge of a laminar hot gas in a colder atmosphere.
We study the boundary layer approximation of the, already classical, mathematical model which describes the discharge of a laminar hot gas in a stagnant colder atmosphere of the same gas. We start by proving the existence and uniqueness of solutions of the nondegenerate problem under assumptions implying that the temperature T and the horizontal velocity u of the gas are strictly positive: T ≥ δ > 0 and u ≥ ε > 0 (here δ and ε are given as boundary conditions in the external atmosphere)....
Metastability in the shadow system for Gierer-Meinhardt's equations.
Methane hydrate formation and decomposition.
Monotone Iterative Methods for Finite Difference System of Reaction-Diffusion Equations.
Monotonicity in time and stationary solutions for a quasilinear heat equation with source.
Multicomponent flow in a porous medium. Adsorption and Soret effect phenomena : local study and upscaling process
Our aim here is to study the thermal diffusion phenomenon in a forced convective flow. A system of nonlinear parabolic equations governs the evolution of the mass fractions in multicomponent mixtures. Some existence and uniqueness results are given under suitable conditions on state functions. Then, we present a numerical scheme based on a “mixed finite element” method adapted to a finite volume scheme, of which we give numerical analysis. In a last part, we apply an homogenization technique to...
Multicomponent flow in a porous medium. Adsorption and Soret effect phenomena: local study and upscaling process
Our aim here is to study the thermal diffusion phenomenon in a forced convective flow. A system of nonlinear parabolic equations governs the evolution of the mass fractions in multicomponent mixtures. Some existence and uniqueness results are given under suitable conditions on state functions. Then, we present a numerical scheme based on a "mixed finite element"method adapted to a finite volume scheme, of which we give numerical analysis. In a last part, we apply an homogenization technique to...