Local Gradient Estimate for $p$-harmonic functions on Riemannian Manifolds

Details Local Gradient Estimate for $p$-harmonic functions on Riemannian Manifolds Local Gradient Estimate for $p$-harmonic functions on Riemannian Manifolds

2010-10-14

arxiv.org/abs/1010.2889v1

Mathematics

Differential Geometry

10 pages

Scientific paper

For positive $p$-harmonic functions on Riemannian manifolds, we derive a gradient estimate and Harnack inequality with constants depending only on the lower bound of the Ricci curvature, the dimension $n$, $p$ and the radius of the ball on which the function is defined. Our approach is based on a careful application of the Moser iteration technique and is different from Cheng-Yau's method employed by Kostchwar and Ni, in which a gradient estimate for positive $p$-harmonic functions is derived under the assumption that the sectional curvature is bounded from below.

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