Question

Can the FHHF theorem be proved using the Freyd-Mitchell embedding theorem?

score 76 · Answer 1 · 2023-10-19 04:16:59

76

Views

Can the FHHF theorem be proved using the Freyd-Mitchell embedding theorem?

Published on 19 Oct 2023 - 4:16

score 55 · Answer 2 · 2023-10-19 12:14:26

55

Views

Proof check for connectivity of connected components

Published on 19 Oct 2023 - 12:14

score 158 · Answer 3 · 2026-03-30 15:31:20

158

Views

how to find the formula for $n$-th Fibonacci numbers ($F_n = \frac{a^n-b^n}{a-b}$) and prove it without induction.

Published on 30 Mar 2026 - 15:31

score 113 · Answer 4 · 2023-10-23 11:05:11

113

Views

median equals half of the side (trigonometric proof)

Published on 23 Oct 2023 - 11:05

score 92 · Answer 5 · 2026-04-02 03:38:25

92

Views

Can I avoid using the axiom of choice to solve 3-13? (Michael Spivak's "Calculus on Manifolds")

Published on 02 Apr 2026 - 3:38

score 44 · Answer 6 · 2023-10-29 15:24:26

44

Views

$\varepsilon$-$N$ definition of limit to prove that $\lim[(2n+1)/(5n-2)] = 2/5$ as $n$ goes to $\infty$

Published on 29 Oct 2023 - 15:24

score 79 · Answer 7 · 2023-11-02 01:10:04

79

Views

Proof of Dirichlet's Theorem on Primes using $\sum_{\substack{p=1\\ p\equiv h\bmod k}}^\infty\frac{\ln p}{p^s}\sim\frac{1}{\varphi(k)(s-1)}$

Published on 02 Nov 2023 - 1:10

score 110 · Answer 8 · 2023-11-04 20:42:28

110

Views

Alternative reference for generators of ${\rm SL}(2,q)$.

Published on 04 Nov 2023 - 20:42

score 50 · Answer 9 · 2026-03-25 14:33:19

50

Views

Conceptual explanation for extra/missing $p$ solutions to $x^2+y^2=a \pmod p$ at $a=0$

Published on 25 Mar 2026 - 14:33

score 40 · Answer 10 · 2026-03-28 10:04:42

40

Views

Could you prove van der Waerden's theorem with a probabilistic argument

Published on 28 Mar 2026 - 10:04

score 75 · Answer 11 · 2026-03-26 04:36:23

75

Views

$\sum \frac{a^2+b^2}{c^2}-\frac{7}{2} \geq \sqrt[3]{\prod \left(\frac{a}{b+c}+\frac{1}{3}\right)}$ for a,b,c real

Published on 26 Mar 2026 - 4:36

score 29 · Answer 12 · 2023-11-14 13:29:42

29

Views

How to prove the orders of conjugate classes always divide the order of the group, using a specific simple method (described below)

Published on 14 Nov 2023 - 13:29

score 53 · Answer 13 · 2023-11-14 13:52:12

53

Views

Cardinality of disjoint infinite union

Published on 14 Nov 2023 - 13:52

score 156 · Answer 14 · 2026-04-03 10:08:54

156

Views

Is $\mathbb(Q, +)$ isomorphic to $\mathbb(R, +)$? (without using uncountability)

Published on 03 Apr 2026 - 10:08

score 47 · Answer 15 · 2026-04-01 05:15:55

47

Views

A direct proportionality problem: alternative proof

Published on 01 Apr 2026 - 5:15

List Question

Can the FHHF theorem be proved using the Freyd-Mitchell embedding theorem?

Proof check for connectivity of connected components

how to find the formula for $n$-th Fibonacci numbers ($F_n = \frac{a^n-b^n}{a-b}$) and prove it without induction.

median equals half of the side (trigonometric proof)

Can I avoid using the axiom of choice to solve 3-13? (Michael Spivak's "Calculus on Manifolds")

$\varepsilon$-$N$ definition of limit to prove that $\lim[(2n+1)/(5n-2)] = 2/5$ as $n$ goes to $\infty$

Proof of Dirichlet's Theorem on Primes using $\sum_{\substack{p=1\\ p\equiv h\bmod k}}^\infty\frac{\ln p}{p^s}\sim\frac{1}{\varphi(k)(s-1)}$

Alternative reference for generators of ${\rm SL}(2,q)$.

Conceptual explanation for extra/missing $p$ solutions to $x^2+y^2=a \pmod p$ at $a=0$

Could you prove van der Waerden's theorem with a probabilistic argument

$\sum \frac{a^2+b^2}{c^2}-\frac{7}{2} \geq \sqrt[3]{\prod \left(\frac{a}{b+c}+\frac{1}{3}\right)}$ for a,b,c real

How to prove the orders of conjugate classes always divide the order of the group, using a specific simple method (described below)

Cardinality of disjoint infinite union

Is $\mathbb(Q, +)$ isomorphic to $\mathbb(R, +)$? (without using uncountability)

A direct proportionality problem: alternative proof

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