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arxiv: 0907.1398 · v2 · submitted 2009-07-08 · 🧮 math.GR · math.CO

Lamplighter graphs do not admit harmonic functions of finite energy

classification 🧮 math.GR math.CO
keywords finitegraphadmitenergyharmoniclamplighterdirichletfunction
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We prove that a lamplighter graph of a locally finite graph over a finite graph does not admit a non-constant harmonic function of finite Dirichlet energy.

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