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Results tagged with gr.group-theory
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user 41827
Questions about the branch of algebra that deals with groups.
4
votes
Accepted
Speed and absence of non-constant bounded harmonic functions
Here is an alternative simple proof (without any entropy) of non-Liouville $\Rightarrow$ positive speed using some of the theory of the Martin boundary/positive harmonic functions. It's quite high-lev …
- 775
7
votes
1
answer
252
views
Krasner–Kaloujnine universal embedding theorem for finitely generated groups?
The Krasner–Kaloujnine universal embedding theorem states that any group extension of a group $H$ by a group $A$ is isomorphic to a subgroup of the regular wreath product $A \operatorname{Wr} H$. When …
- 775