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arXiv · 1303.7198

Harmonic functions of general graph Laplacians

Bobo Hua·Matthias Keller
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Abstract

We study harmonic functions on general weighted graphs which allow for a compatible intrinsic metric. We prove an $L^{p}$ Liouville type theorem which is a quantitative integral $L^{p}$ estimate of harmonic functions analogous to Karp's theorem for Riemannian manifolds. As corollaries we obtain Yau's $L^{p}$-Liouville type theorem on graphs, identify the domain of the generator of the semigroup on $L^{p}$ and get a criterion for recurrence. As a side product, we show an analogue of Yau's $L^{p}$ Caccioppoli inequality. Furthermore, we derive various Liouville type results for harmonic functions on graphs and harmonic maps from graphs into Hadamard spaces.

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BibTeXRIS

Bobo Hua, Matthias Keller. 2013-03-28. Harmonic functions of general graph Laplacians. https://arxiv.org/abs/1303.7198

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