Large time behavior of solutions of viscous Hamilton-Jacobi Equations with superquadratic Hamiltonian

TL;DR

This paper investigates the long-term behavior of solutions to viscous Hamilton-Jacobi equations with superquadratic growth, linking their asymptotics to stationary problems with Dirichlet and state constraint boundary conditions.

Contribution

It provides a detailed analysis of the asymptotic behavior of solutions for superquadratic Hamilton-Jacobi equations with inhomogeneous boundary conditions, connecting dynamic solutions to stationary problems.

Findings

Connection between long-time solutions and stationary problems

Analysis of boundary conditions in the superquadratic case

Conditions under which solutions stabilize over time

Abstract

We study the long-time behavior of the unique viscosity solution $u$ of the viscous Hamilton-Jacobi Equation $u_t-\Delta u + |Du|^m = f\hbox{in }\Omega\times (0,+\infty)$ with inhomogeneous Dirichlet boundary conditions, where $\Omega$ is a bounded domain of $\mathbb{R}^N$. We mainly focus on the superquadratic case ($m>2$) and consider the Dirichlet conditions in the generalized viscosity sense. Under rather natural assumptions on $f,$ the initial and boundary data, we connect the problem studied to its associated stationary generalized Dirichlet problem on one hand and to a stationary problem with a state constraint boundary condition on the other hand.