Question

Please vet : Special case from proof of $\gcd(a,b) \mid a$

score 110 · Answer 1 · 2026-03-25 03:02:41

110

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Please vet : Special case from proof of $\gcd(a,b) \mid a$

Published on 25 Mar 2026 - 3:02

score 2.5k · Answer 2 · 2026-05-10 16:00:22

2.5k

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How to prove or disprove surjectivity of a complex function?

Published on 10 May 2026 - 16:00

score 626 · Answer 3 · 2026-05-10 12:55:10

626

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Proof verification: If $a \equiv b (mod$ $n)$, then $a^3 \equiv b^3 (mod$ $n)$

Published on 10 May 2026 - 12:55

score 6.3k · Answer 4 · 2026-04-29 12:54:17

6.3k

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Conjugate function of log-sum-exp?

Published on 29 Apr 2026 - 12:54

score 144 · Answer 5 · 2026-05-10 12:34:14

144

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Bounds for $\underbrace{\sqrt {a+\sqrt{a+\sqrt {a+...+\sqrt{a}}}}}_\text{$a$ roots}$ in terms of $a$?

Published on 10 May 2026 - 12:34

score 262 · Answer 6 · 2026-05-07 19:08:02

262

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If true, prove (01+0)0 = 0(10+0), else provide a counter example.

Published on 07 May 2026 - 19:08

score 791 · Answer 7 · 2026-04-29 12:26:24

791

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Finding a bijection between the Cantor set and $[0, 1]$

Published on 29 Apr 2026 - 12:26

score 651 · Answer 8 · 2026-05-10 12:16:15

651

Views

Show that the group $\mathbb Z_{45}$ has exactly one subgroup of order $3$ and construct it.

Published on 10 May 2026 - 12:16

score 1.2k · Answer 9 · 2026-05-07 10:12:58

1.2k

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An irreducible Markov chain cannot have an absorbing state

Published on 07 May 2026 - 10:12

score 86 · Answer 10 · 2026-05-10 13:21:53

86

Views

Norm of an operator $T$

Published on 10 May 2026 - 13:21

score 51 · Answer 11 · 2026-05-10 15:46:47

51

Views

In $A=k[[X^2,X^3]]$ no prime power is equal to $(X^3)$

Published on 10 May 2026 - 15:46

score 32 · Answer 12 · 2026-04-12 04:54:33

32

Views

Can this method be used to prove a number is transcendental?

Published on 12 Apr 2026 - 4:54

score 2.7k · Answer 13 · 2026-04-17 08:41:43

2.7k

Views

What is tricky about proving the Nielsen–Schreier theorem?

Published on 17 Apr 2026 - 8:41

score 1k · Answer 14 · 2026-04-16 09:20:17

1k

Views

Counting the number of upper triangular matrices in $GL_n(\mathbb{F}_p)$

Published on 16 Apr 2026 - 9:20

score 40 · Answer 15 · 2026-04-29 12:26:04

40

Views

Proof verification: $a+b\equiv b+a \;\; (mod\;\;n)$ and $ab\equiv ba \;\; (mod\;\;n)$.

Published on 29 Apr 2026 - 12:26

List Question

Please vet : Special case from proof of $\gcd(a,b) \mid a$

How to prove or disprove surjectivity of a complex function?

Proof verification: If $a \equiv b (mod$ $n)$, then $a^3 \equiv b^3 (mod$ $n)$

Conjugate function of log-sum-exp?

Bounds for $\underbrace{\sqrt {a+\sqrt{a+\sqrt {a+...+\sqrt{a}}}}}_\text{$a$ roots}$ in terms of $a$?

If true, prove (01+0)0 = 0(10+0), else provide a counter example.

Finding a bijection between the Cantor set and $[0, 1]$

Show that the group $\mathbb Z_{45}$ has exactly one subgroup of order $3$ and construct it.

An irreducible Markov chain cannot have an absorbing state

Norm of an operator $T$

In $A=k[[X^2,X^3]]$ no prime power is equal to $(X^3)$

Can this method be used to prove a number is transcendental?

What is tricky about proving the Nielsen–Schreier theorem?

Counting the number of upper triangular matrices in $GL_n(\mathbb{F}_p)$

Proof verification: $a+b\equiv b+a \;\; (mod\;\;n)$ and $ab\equiv ba \;\; (mod\;\;n)$.

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