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Comparison principle for dirichlet-type Hamilton-Jacobi equations and singular perturbations of degenerated elliptic equations

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Abstract

Under a nondegeneracy condition on the boundary, we prove a comparison principle for discontinuous viscosity sub- and supersolutions of the generalized Dirichlet boundary-value problem for a first-order Hamilton-Jacobi equation

$$\left\{ {\begin{array}{*{20}c} {H(x,u,Du) = 0 in \Omega ,} \\ {Max(H(x,u,Du);u - \varphi ) \geqslant 0 on \partial \Omega ,} \\ {Min(H(x,u,Du);u - \varphi ) \leqslant 0 on \partial \Omega .} \\ \end{array} } \right.$$

For optimal control problems, we interpret this nondegeneracy as a condition on the controlled vector fields. Finally, we use this to extend classical singular perturbation results to degenerated elliptic equations.

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Communicated by A. Bensoussan

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Barles, G., Perthame, B. Comparison principle for dirichlet-type Hamilton-Jacobi equations and singular perturbations of degenerated elliptic equations. Appl Math Optim 21, 21–44 (1990). https://doi.org/10.1007/BF01445155

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