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A Gamma-convergence argument for the blow-up of a non-local semilinear parabolic equation with Neumann boundary conditions. (English) Zbl 1112.35108
Summary: We study a simple non-local semilinear parabolic equation in a bounded domain with Neumann boundary conditions. We obtain a global existence result for initial data whose L -norm is less than a constant depending explicitly on the geometry of the domain. A natural energy is associated to the equation, and we establish a relationship between the finite-time blow up of solutions and the negativity of their energy. The proof of this result is based on a Gamma-convergence technique.

MSC:
35K60Nonlinear initial value problems for linear parabolic equations
35B35Stability of solutions of PDE
35B40Asymptotic behavior of solutions of PDE
35K55Nonlinear parabolic equations
35K57Reaction-diffusion equations
45K05Integro-partial differential equations