Gradient estimates for a degenerate parabolic equation with gradient absorption and applications

Details Gradient estimates for a degenerate parabolic equation with gradient absorption and applications Gradient estimates for a degenerate parabolic equation with gradient absorption and applications

2007-08-10

arxiv.org/abs/0708.1431v1

Mathematics

Analysis of PDEs

Scientific paper

Qualitative properties of non-negative solutions to a quasilinear degenerate parabolic equation with an absorption term depending solely on the gradient are shown, providing information on the competition between the nonlinear diffusion and the nonlinear absorption. In particular, the limit as time goes to infinity of the mass of integrable solutions is identified, together with the rate of expansion of the support for compactly supported initial data. The persistence of dead cores is also shown. The proof of these results strongly relies on gradient estimates which are first established.

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