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arXiv 0912.4368math.AP
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与向量场相关的Monge-Ampere型方程的比较原理与狄利克雷问题

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

Martino Bardi, Paola Mannucci

摘要:

研究了一类含导数的Monge-Ampere型次椭圆偏微分方程关于卡诺型向量场族X的狄利克雷问题.主要结果是一个比较原则之间的粘性下解,凸关于X,和粘性上解(在一个较弱的意义比通常),这意味着唯一性的解的狄利克雷问题。它的假设包括卡诺群中的水平高斯曲率方程。通过Perron方法,我们还证明了在非线性相对于解的梯度增长的条件下,或假设存在连续达到边界数据的子解的情况下,解的存在性,从而推广了欧几里德Monge-Ampere方程的一些经典结果。

英文摘要:

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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