On C^0-variational solutions for Hamilton-Jacobi equations

Details On C^0-variational solutions for Hamilton-Jacobi equations On C^0-variational solutions for Hamilton-Jacobi equations

2009-04-29

arxiv.org/abs/0904.4557v1

Mathematics

Analysis of PDEs

30 pages

Scientific paper

For evolutive Hamilton-Jacobi equations, we propose a refined definition of C^0-variational solution, adapted to Cauchy problems for continuous initial data. In this weaker framework we investigate the Markovian (or semigroup) property for these solutions. In the case of p-convex Hamiltonians, when variational solutions are known to be identical to viscosity solutions, we verify directly the Markovian property by using minmax techniques. In the non-convex case, we construct an explicit evolutive example where minmax and viscous solutions are different. Provided the initial data allow for the separation of variables, we also detect the Markovian property for convex-concave Hamiltonians. In this case, and for general initial data, we finally give upper and lower Hopf-type estimates for the variational solutions.

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