User Bertrand Haskell - Mathematics Stack Exchange

16 votes

Any finitely generated subgroup of $(\mathbb{Q},+)$ is cyclic.

answered Mar 22, 2020 at 21:01

5 votes

Show that the multiplicative group $(\mathbb{Z}/p\mathbb{Z})^*$ is cyclic

answered Mar 11, 2020 at 20:59

4 votes

Proof of every finite group is finitely presented.

answered Mar 31, 2020 at 22:33

4 votes

Accepted

Degree sequence multigraph without loop

answered Nov 25, 2020 at 0:05

3 votes

Trees in which every vertex is a leaf or adjacent to a leaf

answered Jul 19, 2020 at 15:55

2 votes

Planar networks

answered Dec 26, 2020 at 11:29

2 votes

Accepted

Planar networks

answered Dec 26, 2020 at 12:07

2 votes

Isomorphism between the actions of $G$ on $G/H$ and $G/gHg^{-1}$?

answered Apr 5, 2020 at 22:44

2 votes

Are all cycles in a graph always maximal/minimal cycles?

answered Aug 19, 2021 at 15:15

2 votes

A question about inverse closed subsets of $G \setminus \{e\}$

answered Jan 10 at 14:06

2 votes

Accepted

A generalization of Turan's theorem

answered Jan 29 at 13:47

1 vote

Ruzsa–Szemerédi problem for regular graphs

answered Jun 28, 2023 at 8:26

1 vote

Bipartite Graph or not?

answered Sep 14, 2021 at 6:20

1 vote

Accepted

Finding an underlying group and a generating set from given Cayley Graph

answered May 29, 2021 at 22:08

1 vote

Proving $\alpha \implies \alpha$ is derivable

answered May 14, 2021 at 11:09

1 vote

Accepted

Normal closure of $A$ vs $\langle A\rangle$

answered Apr 12, 2020 at 11:58

1 vote

Accepted

Formal grammar for a logic?

answered Aug 31, 2020 at 7:31

1 vote

Is it possible to enumerate all unlabeled, undirected graphs?

answered Jul 22, 2020 at 7:49

1 vote

Is there such thing as a continuous set?

answered Nov 24, 2019 at 14:20

0 votes

Does a finite first-order theory which has a model always have a finite model?

answered Aug 10, 2019 at 18:08

0 votes

Question about the graphical sequences

answered Mar 25, 2020 at 15:41

0 votes

Index of a subgroup containing a Sylow normalizer.

answered Jun 17, 2020 at 21:19

0 votes

For $F$ a finitely generated free $R$-module, prove $F \cong \text{Hom}_R (F, R)$

answered May 16, 2020 at 21:48

0 votes

There is only one structure of ring (with identity) on the abelian group $(\mathbb{Z},+)$. Prove that a certain ring homomorphism is surjective.

answered Apr 17, 2020 at 17:25

0 votes

Graph theory complete multiparite graph

answered Sep 15, 2021 at 3:30

0 votes

Accepted

Semigroup without a weak basis

answered Dec 21, 2020 at 0:54

0 votes

Prove general statement to be true in all cases

answered May 12, 2021 at 7:09

0 votes

Accepted

Intersecting solutions

answered Apr 27, 2023 at 10:26

0 votes

Proving complete multipartite graph

answered Sep 14, 2021 at 8:53

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29 Answers

Any finitely generated subgroup of $(\mathbb{Q},+)$ is cyclic.

Show that the multiplicative group $(\mathbb{Z}/p\mathbb{Z})^*$ is cyclic

Proof of every finite group is finitely presented.

Degree sequence multigraph without loop

Trees in which every vertex is a leaf or adjacent to a leaf

Planar networks

Planar networks

Isomorphism between the actions of $G$ on $G/H$ and $G/gHg^{-1}$?

Are all cycles in a graph always maximal/minimal cycles?

A question about inverse closed subsets of $G \setminus \{e\}$

A generalization of Turan's theorem

Ruzsa–Szemerédi problem for regular graphs

Bipartite Graph or not?

Finding an underlying group and a generating set from given Cayley Graph

Proving $\alpha \implies \alpha$ is derivable

Normal closure of $A$ vs $\langle A\rangle$

Formal grammar for a logic?

Is it possible to enumerate all unlabeled, undirected graphs?

Is there such thing as a continuous set?

Does a finite first-order theory which has a model always have a finite model?

Question about the graphical sequences

Index of a subgroup containing a Sylow normalizer.

For $F$ a finitely generated free $R$-module, prove $F \cong \text{Hom}_R (F, R)$

There is only one structure of ring (with identity) on the abelian group $(\mathbb{Z},+)$. Prove that a certain ring homomorphism is surjective.

Graph theory complete multiparite graph

Semigroup without a weak basis

Prove general statement to be true in all cases

Intersecting solutions

Proving complete multipartite graph