List questions from geometric-group-theory

282

Views

How can I write $\mathbb{Z}^2 \ast \mathbb{Z}^2$ an HNN-extension with infinite cyclic associated subgroups?

Published on 23 Mar 2026 - 4:37

92

Views

Decompose a 1D polynomial into irreducible representations

Published on 23 Mar 2026 - 13:40

199

Views

Fixed points of a group action on tree

Published on 25 Mar 2026 - 10:53

41

Views

Non nesting action on Real Trees

Published on 23 Mar 2026 - 3:04

75

Views

Help with properly discontinuous action implication in Milnor-Schwarz lemma.

Published on 23 Mar 2026 - 11:37

59

Views

If $b, c \in G$ act on $T$ and fix disjoint (but nonempty) sets of vertices, then $bc$ doesn't fix any vertex

Published on 23 Mar 2026 - 4:01

71

Views

H. Abels' paper about Specker compactifications

Published on 23 Mar 2026 - 2:38

69

Views

Exact value of exponential growth rate depends on generating set

Published on 19 Mar 2026 - 12:03

107

Views

Presentation of a group generated by reflections through hyperplane

Published on 25 Mar 2026 - 12:46

61

Views

Characterize edge-transitive Cayley Graphs

Published on 25 Mar 2026 - 15:38

89

Views

Why do we use two constants in the definition of quasi-isometric embedding?

Published on 25 Mar 2026 - 14:27

518

Views

Small diameter, mixing time, and Expander graphs

Published on 25 Mar 2026 - 9:31

190

Views

$\infty$-ended subgroups of one-ended groups

Published on 25 Mar 2026 - 10:52

506

Views

How does convergence of sequences define a topology? Question about the definition of the topology of the Gromov boundary.

Published on 23 Mar 2026 - 5:31

266

Views

hyperbolic groups are centerless (reference request)

Published on 22 Mar 2026 - 19:04

List Question

How can I write $\mathbb{Z}^2 \ast \mathbb{Z}^2$ an HNN-extension with infinite cyclic associated subgroups?

Decompose a 1D polynomial into irreducible representations

Fixed points of a group action on tree

Non nesting action on Real Trees

Help with properly discontinuous action implication in Milnor-Schwarz lemma.

If $b, c \in G$ act on $T$ and fix disjoint (but nonempty) sets of vertices, then $bc$ doesn't fix any vertex

H. Abels' paper about Specker compactifications

Exact value of exponential growth rate depends on generating set

Presentation of a group generated by reflections through hyperplane

Characterize edge-transitive Cayley Graphs

Why do we use two constants in the definition of quasi-isometric embedding?

Small diameter, mixing time, and Expander graphs

$\infty$-ended subgroups of one-ended groups

How does convergence of sequences define a topology? Question about the definition of the topology of the Gromov boundary.

hyperbolic groups are centerless (reference request)

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