Comparison principles and Dirichlet problem for equations of Monge-Ampere type associated to vector fields

Details Comparison principles and Dirichlet problem for equations of Monge-Ampere type associated to vector fields Comparison principles and Dirichlet problem for equations of Monge-Ampere type associated to vector fields

2009-12-22

arxiv.org/abs/0912.4368v1

Mathematics

Analysis of PDEs

Scientific paper

We study the Dirichlet problem for subelliptic partial differential equations of Monge-Ampere type involving the derivates with respect to a family X of vector fields of Carnot type. The main result is a comparison principle among viscosity subsolutions, convex with respect to X, and viscosity supersolutions (in a weaker sense than usual), which implies the uniqueness of solution to the Dirichlet problem. Its assumptions include the equation of prescribed horizontal Gauss curvature in Carnot groups. By Perron method we also prove the existence of a solution either under a growth condition of the nonlinearity with respect to the gradient of the solution, or assuming the existence of a subsolution attaining continuously the boundary data, therefore generalizing some classical result for Euclidean Monge-Ampere equations.

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