List questions from combinatorial-group-theory

Published on 06 Apr 2022 - 3:50

73

Views

Reference request: proof of the Rips Construction

Published on 16 Apr 2022 - 1:15

59

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Group actions on Cartesian Product of a path and a cycle

Published on 18 Apr 2022 - 17:41

115

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If a finitely generated semi-direct product $\mathbb{Z}$ acting on a non finitely generated group, can the fixed points form a non-normal subgroup?

Published on 29 Apr 2022 - 16:34

113

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Word problem in residually finite groups - enumerating normal subgroups

Published on 08 May 2022 - 13:50

34

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Is there an algorithm that can compute finite presentations for finitely presentable subgroups in a FP group with solvable word problem?

Published on 23 Feb 2026 - 16:51

52

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group presentation with circularly shifted relator

Published on 09 May 2022 - 22:19

91

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Expressing the fundamental group of the Klein bottle as an HNN extension appears to contradict Britton's Lemma

Published on 21 May 2022 - 16:15

158

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Finite index subgroup isomorphic to $\Bbb{Z}$ inside the free product $\Bbb{Z}_{2}*\Bbb{Z}_{2}$

Published on 26 Mar 2026 - 6:15

45

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Homomorphic image of the modular group that has the infinite order.

Published on 27 Jun 2022 - 17:36

78

Views

Natural numbers in triangle groups

Published on 05 Jul 2022 - 13:13

174

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Condition for Baumslag-Solitar group to be virtually abelian

Published on 05 Jul 2022 - 15:07

250

Views

Is turtle graphics a group?

Published on 09 Jul 2022 - 16:27

73

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What is a general way to prove isomorphism between groups with presentations?

Published on 11 Jul 2022 - 1:51

915

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How to verify this group presentation is contradictory

Published on 11 Jul 2022 - 14:24

List Question

Clarification on the Nielsen-Schreier Theorem

Reference request: proof of the Rips Construction

Group actions on Cartesian Product of a path and a cycle

If a finitely generated semi-direct product $\mathbb{Z}$ acting on a non finitely generated group, can the fixed points form a non-normal subgroup?

Word problem in residually finite groups - enumerating normal subgroups

Is there an algorithm that can compute finite presentations for finitely presentable subgroups in a FP group with solvable word problem?

group presentation with circularly shifted relator

Expressing the fundamental group of the Klein bottle as an HNN extension appears to contradict Britton's Lemma

Finite index subgroup isomorphic to $\Bbb{Z}$ inside the free product $\Bbb{Z}_{2}*\Bbb{Z}_{2}$

Homomorphic image of the modular group that has the infinite order.

Natural numbers in triangle groups

Condition for Baumslag-Solitar group to be virtually abelian

Is turtle graphics a group?

What is a general way to prove isomorphism between groups with presentations?

How to verify this group presentation is contradictory

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