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2 votes
1 answer
202 views

Strong Liouville property of virtually abelian groups

Let $G$ be a finitely generated group and let $\mu$ be a symmetric non-degenerate measure on $G$. By strong Liouville property for $(G, \mu)$, we mean that every positive $\mu$-harmonic function on $G$...
SMS's user avatar
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3 votes
1 answer
209 views

A few points of clarification on the Martin boundary

Let $\Gamma$ be a finitely generated group, and let $M$ be the Martin boundary of $\Gamma$. I was reading the article on Martin boundary on Encyclopedia of Math, and I have a few questions about what ...
SMS's user avatar
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4 votes
1 answer
202 views

Green's kernel estimates on finitely generated groups

I was reading a paper by W. Hebisch and L. Saloff-Coste titled "Gaussian Estimates for Markov Chains and Random Walks on Groups" where I came to know about certain bounds on convolution ...
Y. Paka's user avatar
  • 131
6 votes
1 answer
252 views

Positive harmonic functions on nilpotent groups & Random walk on groups with a finite number of generators

I want to read the following papers in the English version which I could not find anywhere (the only papers I can get are the Russian versions). Kindly help me out. Gregory A. Margulis, Positive ...
piper1967's user avatar
  • 1,177
1 vote
1 answer
210 views

Liouville property of hyperbolic spaces

It seems classically known (and mentioned in several papers without reference) that there exist bounded non-constant harmonic functions on the hyperbolic space $\mathbb{H}^n, n \geq 2$. I am ...
SMS's user avatar
  • 1,407
0 votes
1 answer
187 views

Harmonicity of the Martin kernels

Let $\Gamma$ be a finitely generated group and let $\mu$ be a probability measure on $\Gamma$. Consider the Green function $G(x,y)=\sum_{n\geq 0}\mu^{*n}(x^{-1}y)$, where $\mu^{*n}$ is the $n$th ...
M. Dus's user avatar
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