A Lower Bound for the Gradient of ∞-harmonic Functions
نویسنده
چکیده
We establish a lower bound for the gradient of the solution to∞-Laplace equation in a strongly star-shaped annulus with capacity type boundary conditions. The proof involves properties of the radial derivative of the solution, so that starshapedness of level sets easily follows.
منابع مشابه
A lower estimate of harmonic functions
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تاریخ انتشار 1996