Large-time asymptotics for nonlinear diffusions: the initial-boundary value problem

نویسندگان

  • F. Salvarani
  • G. Toscani
چکیده

In this paper we investigate the large-time behavior of solutions to the first initial-boundary value problem for the non-linear diffusion ut = (u )xx, m > 0. In particular, we prove exponential decay of u(x, t) towards its own steady state in L1-norm for long times and we give an explicit upper bound for the rate of decay. The result is based on a new application of entropy estimates, and on detailed lower bounds for the entropy production in this situation.

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تاریخ انتشار 2004