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• W2949169516 abstract "The behavior near the extinction time is identified for non-negative solutions to the diffusive Hamilton-Jacobi equation with critical gradient absorption $partial_t u - Delta_p u + |nabla u|^{p-1} = 0$ in $(0, infty) times mathbb{R}^N$, and fast diffusion $2N/(N + 1) < p < 2$. Given a non-negative and radially symmetric initial condition with a non-increasing profile which decays sufficiently fast as $|x| to infty$, it is shown that the corresponding solution $u$ to the above equation approaches a uniquely determined separate variable solution of the form $U(t, x) = (T_e - t)^{1/(2-p)} f_* (|x|), (t, x) in (0, T_e) times mathbb{R}^N$, as $t to T_e$, where $T_e$ denotes the finite extinction time of $u$. A cornerstone of the convergence proof is an underlying variational structure of the equation. Also, the selected profile $f_*$ is the unique non-negative solution to a second order ordinary differential equation which decays exponentially at infinity. A complete classification of solutions to this equation is provided, thereby describing all separate variable solutions of the original equation. One important difficulty in the uniqueness proof is that no monotonicity argument seems to be available and it is overcome by the construction of an appropriate Pohozaev functional." @default.
• W2949169516 created "2019-06-27" @default.
• W2949169516 creator A5002395669 @default.
• W2949169516 creator A5033962589 @default.
• W2949169516 date "2016-06-06" @default.
• W2949169516 modified "2023-10-01" @default.
• W2949169516 title "Self-similar extinction for a diffusive Hamilton-Jacobi equation with critical absorption" @default.
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• W2949169516 hasPublicationYear "2016" @default.
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