Question

I wish to change my old algorithm by another old algorithm RATCONVERT

score 161 · Answer 1 · 2026-04-12 03:08:23

161

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I wish to change my old algorithm by another old algorithm RATCONVERT

Published on 12 Apr 2026 - 3:08

score 704 · Answer 2 · 2026-04-16 22:00:08

704

Views

Diagonals of quadrilateral $ABCD$ intersect at $E$. Given $\frac{AE}{AC} = λ,\>\frac{BE}{BD} = μ$. Find ratios for sides

Published on 16 Apr 2026 - 22:00

score 44 · Answer 3 · 2026-04-14 10:19:38

44

Views

Show that a commutative ring with unit A is an integral ring if, and only if, $\langle 0 \rangle$ is a prime.

Published on 14 Apr 2026 - 10:19

score 89 · Answer 4 · 2026-04-09 00:26:54

89

Views

Suggestion applications Cauchy's integral formula

Published on 09 Apr 2026 - 0:26

score 139 · Answer 5 · 2026-04-17 05:28:30

139

Views

Proving image of $f:D^n\rightarrow \mathbb{R}^n \;$ contains $\;D^n$

Published on 17 Apr 2026 - 5:28

score 76 · Answer 6 · 2026-04-15 02:35:12

76

Views

Finding a nice solution to $\sum_{a,b,c\ge 1, a+b+c=9}\frac{9!}{a!b!c!}=18150$

Published on 15 Apr 2026 - 2:35

score 251 · Answer 7 · 2026-04-15 22:44:19

251

Views

Proving a convoluted proof to an inequality: $x,y>0$ such that $x^2+y^2=1$. Prove that, $x^3+y^3 \geqslant \sqrt2 xy $

Published on 15 Apr 2026 - 22:44

score 188 · Answer 8 · 2026-04-13 23:03:55

188

Views

Double refinement of Nesbitt's inequality

Published on 13 Apr 2026 - 23:03

score 117 · Answer 9 · 2026-04-18 10:18:31

117

Views

Prove that $f$ is constant $\Leftrightarrow$ for all point pair $x,y \in \mathbb{R} $, $ | f(x) - f(y) | \leq (x-y)^2 $

Published on 18 Apr 2026 - 10:18

score 93 · Answer 10 · 2026-04-09 06:51:51

93

Views

Fake proof regarding continuity.

Published on 09 Apr 2026 - 6:51

score 502 · Answer 11 · 2026-03-25 13:59:47

502

Views

Why does a convex polyhedron being vertex-, edge-, and face-transitive imply that it is a Platonic solid?

Published on 25 Mar 2026 - 13:59

score 161 · Answer 12 · 2026-04-10 11:01:49

161

Views

Proof regarding continuity and Dirichlet function.

Published on 10 Apr 2026 - 11:01

score 72 · Answer 13 · 2026-04-09 16:27:49

72

Views

Proof regarding Weistrass theorem.

Published on 09 Apr 2026 - 16:27

score 75 · Answer 14 · 2026-04-16 10:02:06

75

Views

Calculate $I= \iiint\limits_{\Omega}2\,{\rm d}x\,{\rm d}y\,{\rm d}z$

Published on 16 Apr 2026 - 10:02

score 367 · Answer 15 · 2026-04-17 03:48:26

367

Views

Proving $\arctan x$ has no extreme points.

Published on 17 Apr 2026 - 3:48

List Question

I wish to change my old algorithm by another old algorithm RATCONVERT

Diagonals of quadrilateral $ABCD$ intersect at $E$. Given $\frac{AE}{AC} = λ,\>\frac{BE}{BD} = μ$. Find ratios for sides

Show that a commutative ring with unit A is an integral ring if, and only if, $\langle 0 \rangle$ is a prime.

Suggestion applications Cauchy's integral formula

Proving image of $f:D^n\rightarrow \mathbb{R}^n \;$ contains $\;D^n$

Finding a nice solution to $\sum_{a,b,c\ge 1, a+b+c=9}\frac{9!}{a!b!c!}=18150$

Proving a convoluted proof to an inequality: $x,y>0$ such that $x^2+y^2=1$. Prove that, $x^3+y^3 \geqslant \sqrt2 xy $

Double refinement of Nesbitt's inequality

Prove that $f$ is constant $\Leftrightarrow$ for all point pair $x,y \in \mathbb{R} $, $ | f(x) - f(y) | \leq (x-y)^2 $

Fake proof regarding continuity.

Why does a convex polyhedron being vertex-, edge-, and face-transitive imply that it is a Platonic solid?

Proof regarding continuity and Dirichlet function.

Proof regarding Weistrass theorem.

Calculate $I= \iiint\limits_{\Omega}2\,{\rm d}x\,{\rm d}y\,{\rm d}z$

Proving $\arctan x$ has no extreme points.

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