User HJRW

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boundary of semihyperbolic groups

answered Feb 17, 2016 at 10:16

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The question about elementary equivalence of free products

answered Apr 2, 2019 at 17:12

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Residual finiteness of hyperbolic 3-manifold groups

answered Mar 21 at 8:53

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When the fundamental group of subgraph of groups embeds?

answered Mar 28 at 12:12

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Distinguishing poly-free groups

answered Dec 10, 2021 at 14:07

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Angles and Busemann function in CAT(0)

answered Jul 2, 2021 at 7:53

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Does length spectrum determine a hyperbolic 3-manifold? What if we also know holonomies?

answered Apr 21, 2022 at 9:00

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HNN decomposition of finite rank free group over infinite rank subgroups

answered Jul 13, 2022 at 9:36

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Planar Cayley graphs/complexes for coxeter groups

answered Mar 8, 2013 at 10:24

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Fixed point theorems

answered Jun 7, 2013 at 21:10

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An algebraic approach to the thermodynamic limit $N\rightarrow\infty$?

answered Jul 31, 2013 at 15:49

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Cubical Complexes and Bass-Serre theory

answered Dec 12, 2012 at 15:16

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Are all compact groups amenable ?

answered Oct 18, 2012 at 9:37

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Covering spaces of surfaces

answered Aug 20, 2012 at 11:04

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Groups acting on graph

answered Aug 29, 2011 at 7:21

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need a good reference for introduction to elementary theory of groups

answered Feb 14, 2011 at 20:13

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Is Deligne's central extension sofic?

answered Dec 8, 2010 at 18:12

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Does the group $\langle a,b,c \mathbin | a^2b^2c^2=1\rangle $ have $\mathbb{Z} \times F_2$ as a subgroup?

answered Feb 11, 2011 at 19:09

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Finding a presentation for G from a known presentation of G/N

answered Nov 3, 2010 at 0:36

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Fundamental theorems

answered May 20, 2010 at 17:37

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Do decidable properties of finitely presented groups depend only on the profinitization?

answered Feb 27, 2010 at 2:04

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Does every decidable question about finitely presented groups amount to a question about abelian groups?

answered Feb 27, 2010 at 17:33

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Why do branches of math vary in proof styles and what category are different branches in?

answered Nov 5, 2009 at 0:38

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Convex hull in CAT(0)

answered Nov 23, 2009 at 22:37

4 votes

How can we formalize the naturality of certain characteristic subgroups?

answered Nov 27, 2009 at 6:27

4 votes

Introductory text on geometric group theory?

answered Nov 5, 2009 at 16:34

4 votes

Subgroups of a group generated by a free semigroup

answered Nov 4, 2009 at 2:12

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"Remove a vertex" map for right-angled Artin groups

answered Jan 16, 2010 at 0:21

4 votes

$f(f(x))=\exp(x)-1$ and other functions "just in the middle" between linear and exponential

answered Jan 21, 2010 at 6:28

4 votes

"negative" vs "minus"

answered May 15, 2010 at 4:40

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293 Answers

boundary of semihyperbolic groups

The question about elementary equivalence of free products

Residual finiteness of hyperbolic 3-manifold groups

When the fundamental group of subgraph of groups embeds?

Distinguishing poly-free groups

Angles and Busemann function in CAT(0)

Does length spectrum determine a hyperbolic 3-manifold? What if we also know holonomies?

HNN decomposition of finite rank free group over infinite rank subgroups

Planar Cayley graphs/complexes for coxeter groups

Fixed point theorems

An algebraic approach to the thermodynamic limit $N\rightarrow\infty$?

Cubical Complexes and Bass-Serre theory

Are all compact groups amenable ?

Covering spaces of surfaces

Groups acting on graph

need a good reference for introduction to elementary theory of groups

Is Deligne's central extension sofic?

Does the group $\langle a,b,c \mathbin | a^2b^2c^2=1\rangle $ have $\mathbb{Z} \times F_2$ as a subgroup?

Finding a presentation for G from a known presentation of G/N

Fundamental theorems

Do decidable properties of finitely presented groups depend only on the profinitization?

Does every decidable question about finitely presented groups amount to a question about abelian groups?

Why do branches of math vary in proof styles and what category are different branches in?

Convex hull in CAT(0)

How can we formalize the naturality of certain characteristic subgroups?

Introductory text on geometric group theory?

Subgroups of a group generated by a free semigroup

"Remove a vertex" map for right-angled Artin groups

$f(f(x))=\exp(x)-1$ and other functions "just in the middle" between linear and exponential

"negative" vs "minus"