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Asymptotic behavior for a viscous Hamilton-Jacobi equation with critical exponent

Thierry Gallay·Philippe Laurençot
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Abstract

The large time behavior of non-negative solutions to the viscous Hamilton-Jacobi equation $u_t - Δu + |\nabla u|^q = 0$ in the whole space $R^N$ is investigated for the critical exponent $q = (N+2)/(N+1)$. Convergence towards a rescaled self-similar solution of the linear heat equation is shown, the rescaling factor being $(\log(t))^{-(N+1)}$. The proof relies on the construction of a one-dimensional invariant manifold for a suitable truncation of the equation written in self-similar variables.

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Thierry Gallay, Philippe Laurençot. 2006-09-27. Asymptotic behavior for a viscous Hamilton-Jacobi equation with critical exponent. https://arxiv.org/abs/math/0609750

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