arXiv 1801.033832018-01-10math.AP

Games for eigenvalues of the Hessian and concave/convex envelopes

Pablo Blanc, Julio D. Rossi

英文摘要：

We study the PDE $λ_j(D^2 u) = 0$, in $Ω$, with $u=g$, on $\partial Ω$. Here $λ_1(D^2 u) \leq ... \leq λ_N (D^2 u)$ are the ordered eigenvalues of the Hessian $D^2 u$. First, we show a geometric interpretation of the viscosity solutions to the problem in terms of convex/concave envelopes over affine spaces of dimension $j$. In one of our main results, we give necessary and sufficient conditions on the domain so that the problem has a continuous solution for every continuous datum $g$. Next, we introduce a two-player zero-sum game whose values approximate solutions to this PDE problem. In addition, we show an asymptotic mean value characterization for the solution the the PDE.

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