User Minimus Heximus

8 votes

1 answer

927 views

If $H$ and $\frac GH$ are connected so is $G$

asked Jan 18, 2016 at 6:03

7 votes

2 answers

639 views

Existence of a minimal generator for a group?

group-theory

asked Aug 21, 2014 at 21:41

6 votes

1 answer

424 views

Self-duality in a lattice

examples-counterexamples order-theory lattice-orders

asked Jul 30, 2014 at 8:48

6 votes

2 answers

167 views

A compact infinite topological group with only two closed subgroups

general-topology group-theory examples-counterexamples topological-groups

asked Feb 16, 2015 at 16:47

5 votes

1 answer

173 views

Calculating a sum which includes binomial coeffeicients

combinatorics binomial-coefficients wolfram-alpha gap calculator

asked Sep 11, 2015 at 6:39

5 votes

2 answers

156 views

Generality of rings' abelian group

group-theory ring-theory finite-groups

asked May 1, 2014 at 23:03

4 votes

1 answer

198 views

Number of distinct solutions of $x_1+x_2+\dots+x_k=n$ with $0\le x_i\le r$

combinatorics

asked Sep 14, 2015 at 15:07

4 votes

3 answers

117 views

Sets $A_1,A_2,A_3,...$ with $\dots\in A_3\in A_2\in A_1$

elementary-set-theory

asked Jun 24, 2015 at 2:07

4 votes

2 answers

2k views

Number of solutions of $x_1+x_2+\dots+x_k=n$ with $x_i\le r$

combinatorics inclusion-exclusion balls-in-bins

asked Sep 10, 2015 at 14:28

4 votes

1 answer

120 views

Definition of measurability of $f:\Bbb R\to \Bbb R$

measure-theory lebesgue-measure

asked Oct 2, 2018 at 21:55

4 votes

2 answers

399 views

Are quotient groups unique up to isomorphism

group-theory examples-counterexamples

asked Nov 28, 2014 at 3:21

3 votes

1 answer

587 views

Automorphisms of the Prüfer group

group-theory abelian-groups infinite-groups torsion-groups

asked Dec 2, 2014 at 12:45

3 votes

2 answers

90 views

Does $G=HK_1=HK_2$ imply $K_1=K_2$ in a locally cyclic group?

group-theory

asked Sep 12, 2014 at 15:31

3 votes

1 answer

54 views

lattices made by $a\wedge b = ab$ and $a\vee b=a+b-ab$

lattice-orders

asked Apr 10, 2015 at 6:53

3 votes

1 answer

946 views

On provability of Paris–Harrington theorem

logic provability

asked Aug 24, 2015 at 7:17

3 votes

1 answer

47 views

Number of $m$-subsets $Y$ satisfying $|A\cap Y|\le t$

combinatorics

asked Sep 2, 2015 at 0:12

3 votes

1 answer

226 views

what is meant by "the integral is interpreted in the weak sense"?

real-analysis functional-analysis partial-differential-equations terminology lebesgue-integral

asked Oct 4, 2018 at 1:38

3 votes

2 answers

1k views

A proof for $\widehat{\Bbb Z_{p^\infty}}\cong Z_p$

group-theory reference-request topological-groups duality-theorems torsion-groups

asked Nov 24, 2014 at 8:47

3 votes

2 answers

353 views

The Frechet derivative of $\sin(xy)$ at $(\pi,0)$.

real-analysis analysis

asked Dec 10, 2015 at 0:46

3 votes

1 answer

132 views

intersection of locally compact Hausdorff topologies.

general-topology examples-counterexamples

asked Mar 26, 2014 at 20:25

3 votes

0 answers

252 views

An algorithm for generating a finite group with a finite set of generators

finite-groups computational-algebra

asked Apr 17, 2014 at 21:36

3 votes

2 answers

287 views

The length of a poset

order-theory

asked Apr 27, 2014 at 23:17

3 votes

1 answer

96 views

Free cyclic subgroups in a non-abelian group

group-theory examples-counterexamples

asked Jul 20, 2014 at 22:15

3 votes

2 answers

257 views

A non-algebraic complete lattice

examples-counterexamples lattice-orders

asked Aug 6, 2014 at 14:02

3 votes

3 answers

253 views

A persisting element in all subgroups.

group-theory examples-counterexamples cyclic-groups

asked Jul 27, 2014 at 1:50

3 votes

2 answers

214 views

An infinite torsion group with element orders sensitive to subgroups

group-theory

asked Aug 26, 2014 at 1:51

2 votes

1 answer

91 views

$(A\cap B)C=AC\cap BC$ in an infinite group [closed]

group-theory

asked Aug 24, 2014 at 16:01

2 votes

1 answer

55 views

Characterizing groups with linear subgroups

group-theory

asked Aug 16, 2014 at 13:43

2 votes

1 answer

70 views

$\operatorname{Hom}(G,\Bbb C\setminus \{0\})$ non- isomorphic to $\operatorname{Hom}(G, \Bbb T)$?

abstract-algebra group-theory abelian-groups

asked Jun 7, 2014 at 11:57

2 votes

1 answer

174 views

Constructing a group with given normal subgroups.

group-theory

asked Aug 19, 2014 at 23:14

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83 Questions

If $H$ and $\frac GH$ are connected so is $G$

Existence of a minimal generator for a group?

Self-duality in a lattice

A compact infinite topological group with only two closed subgroups

Calculating a sum which includes binomial coeffeicients

Generality of rings' abelian group

Number of distinct solutions of $x_1+x_2+\dots+x_k=n$ with $0\le x_i\le r$

Sets $A_1,A_2,A_3,...$ with $\dots\in A_3\in A_2\in A_1$

Number of solutions of $x_1+x_2+\dots+x_k=n$ with $x_i\le r$

Definition of measurability of $f:\Bbb R\to \Bbb R$

Are quotient groups unique up to isomorphism

Automorphisms of the Prüfer group

Does $G=HK_1=HK_2$ imply $K_1=K_2$ in a locally cyclic group?

lattices made by $a\wedge b = ab$ and $a\vee b=a+b-ab$

On provability of Paris–Harrington theorem

Number of $m$-subsets $Y$ satisfying $|A\cap Y|\le t$

what is meant by "the integral is interpreted in the weak sense"?

A proof for $\widehat{\Bbb Z_{p^\infty}}\cong Z_p$

The Frechet derivative of $\sin(xy)$ at $(\pi,0)$.

intersection of locally compact Hausdorff topologies.

An algorithm for generating a finite group with a finite set of generators

The length of a poset

Free cyclic subgroups in a non-abelian group

A non-algebraic complete lattice

A persisting element in all subgroups.

An infinite torsion group with element orders sensitive to subgroups

$(A\cap B)C=AC\cap BC$ in an infinite group [closed]

Characterizing groups with linear subgroups

$\operatorname{Hom}(G,\Bbb C\setminus \{0\})$ non- isomorphic to $\operatorname{Hom}(G, \Bbb T)$?

Constructing a group with given normal subgroups.