Question

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

score 109 · Answer 1 · 2026-03-14 06:27:10

109

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

Published on 14 Mar 2026 - 6:27

score 2.5k · Answer 2 · 2018-01-21 00:35:20

2.5k

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How to prove or disprove surjectivity of a complex function?

Published on 21 Jan 2018 - 0:35

score 618 · Answer 3 · 2026-03-24 20:38:02

618

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

Published on 24 Mar 2026 - 20:38

score 6.3k · Answer 4 · 2026-03-17 01:54:31

6.3k

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Conjugate function of log-sum-exp?

Published on 17 Mar 2026 - 1:54

score 137 · Answer 5 · 2018-01-21 05:43:42

137

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

Published on 21 Jan 2018 - 5:43

score 254 · Answer 6 · 2026-03-19 21:54:52

254

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

Published on 19 Mar 2026 - 21:54

score 785 · Answer 7 · 2026-03-17 09:17:27

785

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

Published on 17 Mar 2026 - 9:17

score 648 · Answer 8 · 2026-03-24 20:32:09

648

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

Published on 24 Mar 2026 - 20:32

score 1.2k · Answer 9 · 2026-03-20 04:27:47

1.2k

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An irreducible Markov chain cannot have an absorbing state

Published on 20 Mar 2026 - 4:27

score 81 · Answer 10 · 2018-01-21 16:46:27

81

Views

Norm of an operator $T$

Published on 21 Jan 2018 - 16:46

score 47 · Answer 11 · 2018-01-21 16:55:59

47

Views

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

Published on 21 Jan 2018 - 16:55

score 29 · Answer 12 · 2018-01-21 18:55:03

29

Views

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

Published on 21 Jan 2018 - 18:55

score 2.7k · Answer 13 · 2026-03-19 17:27:18

2.7k

Views

What is tricky about proving the Nielsen–Schreier theorem?

Published on 19 Mar 2026 - 17:27

score 1k · Answer 14 · 2018-01-21 20:45:56

1k

Views

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

Published on 21 Jan 2018 - 20:45

score 34 · Answer 15 · 2026-03-24 21:19:34

34

Views

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

Published on 24 Mar 2026 - 21:19

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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