Question

Prove that $(G,\odot)$ is a group $\iff L$ is a subgroup of $\mathrm{S}_G$

score 62 · Answer 1 · 2026-04-14 20:22:10

62

Views

Prove that $(G,\odot)$ is a group $\iff L$ is a subgroup of $\mathrm{S}_G$

Published on 14 Apr 2026 - 20:22

score 50 · Answer 2 · 2026-04-16 03:54:48

50

Views

Proving $x_1y_1 +x_2y_2 + kx_1y_2 + kx_2y_1$ defines a scalar product in $\mathbb{R}^2$ if $|k|$ <1

Published on 16 Apr 2026 - 3:54

score 234 · Answer 3 · 2026-04-16 07:57:05

234

Views

Degree of $\mathbb{Q}(\sqrt{2 + \sqrt{7}})$ and splitting field

Published on 16 Apr 2026 - 7:57

score 42 · Answer 4 · 2026-04-29 23:06:00

42

Views

Organizing proofs by induction over the ordinals

Published on 29 Apr 2026 - 23:06

score 190 · Answer 5 · 2026-04-17 09:18:45

190

Views

$\{x_n\}$ is a bounded above sequence such that $x_{n+1} - x_n \ge a_n$, where $\sum a_k$ converges. Prove $x_n$ converges.

Published on 17 Apr 2026 - 9:18

score 274 · Answer 6 · 2026-04-14 11:26:06

274

Views

Proof Verification: Proving that Function is a Quotient Map

Published on 14 Apr 2026 - 11:26

score 171 · Answer 7 · 2026-04-12 07:36:48

171

Views

Theorems & Proof Corrections [discrete mathematics]

Published on 12 Apr 2026 - 7:36

score 314 · Answer 8 · 2026-04-14 14:36:58

314

Views

Prove that family of subsets is the set of cosets of some subroup of group

Published on 14 Apr 2026 - 14:36

score 16 · Answer 9 · 2026-04-25 02:56:29

16

Views

Want to know if my proof about sequences and accumulation points is correct.

Published on 25 Apr 2026 - 2:56

score 121 · Answer 10 · 2026-05-10 18:58:15

121

Views

Finding the numerical listed string to the center algorithm.

Published on 10 May 2026 - 18:58

score 96 · Answer 11 · 2026-04-15 04:10:08

96

Views

Every ring with identity and even order either has zero divisors or $1+1=0$ holds

Published on 15 Apr 2026 - 4:10

score 464 · Answer 12 · 2026-05-10 20:03:16

464

Views

Universal property of the direct product, proof verification

Published on 10 May 2026 - 20:03

score 119 · Answer 13 · 2026-04-15 12:47:00

119

Views

Using Archimedian property to prove that infimum of set is $0$

Published on 15 Apr 2026 - 12:47

score 166 · Answer 14 · 2026-05-11 07:53:54

166

Views

Waiting time in Poisson process

Published on 11 May 2026 - 7:53

score 71 · Answer 15 · 2026-05-10 16:56:39

71

Views

Infinite Abelian Groups: Unnecessary Hypothesis in Kaplansky's Lemma 7

Published on 10 May 2026 - 16:56

List Question

Prove that $(G,\odot)$ is a group $\iff L$ is a subgroup of $\mathrm{S}_G$

Proving $x_1y_1 +x_2y_2 + kx_1y_2 + kx_2y_1$ defines a scalar product in $\mathbb{R}^2$ if $|k|$ <1

Degree of $\mathbb{Q}(\sqrt{2 + \sqrt{7}})$ and splitting field

Organizing proofs by induction over the ordinals

$\{x_n\}$ is a bounded above sequence such that $x_{n+1} - x_n \ge a_n$, where $\sum a_k$ converges. Prove $x_n$ converges.

Proof Verification: Proving that Function is a Quotient Map

Theorems & Proof Corrections [discrete mathematics]

Prove that family of subsets is the set of cosets of some subroup of group

Want to know if my proof about sequences and accumulation points is correct.

Finding the numerical listed string to the center algorithm.

Every ring with identity and even order either has zero divisors or $1+1=0$ holds

Universal property of the direct product, proof verification

Using Archimedian property to prove that infimum of set is $0$

Waiting time in Poisson process

Infinite Abelian Groups: Unnecessary Hypothesis in Kaplansky's Lemma 7

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