Question

Showing that $\{S^x_{\tau \wedge n}\}_{n\in\mathbb{N}}$ is uniformly integrable

score 51 · Answer 1 · 2026-04-15 09:12:51

51

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Showing that $\{S^x_{\tau \wedge n}\}_{n\in\mathbb{N}}$ is uniformly integrable

Published on 15 Apr 2026 - 9:12

score 62 · Answer 2 · 2026-04-16 00:52:54

62

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Let $a,b,c \le 0$. Then $\max(a,c)+\max(b,c) \le \max(a+b, c)$

Published on 16 Apr 2026 - 0:52

score 306 · Answer 3 · 2026-04-16 17:19:50

306

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Question on analytic continuation of the principal branch of logarithms on $B(1, 1) $

Published on 16 Apr 2026 - 17:19

score 270 · Answer 4 · 2026-04-15 08:22:22

270

Views

Simpler proof that $y^3[d^2y/dx^2]$ is a constant if $y^2=ax^2+bx+c$?

Published on 15 Apr 2026 - 8:22

score 235 · Answer 5 · 2026-04-14 06:26:59

235

Views

The intuition behind this explicit form of an affine hull?

Published on 14 Apr 2026 - 6:26

score 53 · Answer 6 · 2026-04-13 04:54:15

53

Views

A square on the equator of a sphere is a critical point of the electrostatic potential

Published on 13 Apr 2026 - 4:54

score 110 · Answer 7 · 2026-04-18 01:02:44

110

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Write theorem's "scratch work" in Velleman's How to prove it 'given–goal diagrams' style

Published on 18 Apr 2026 - 1:02

score 62 · Answer 8 · 2026-04-15 06:41:05

62

Views

There exists a ball inside the convex hull of the union of $2$ other balls

Published on 15 Apr 2026 - 6:41

score 96 · Answer 9 · 2026-04-10 13:20:23

96

Views

Possible ways of solving an Olympiad question

Published on 10 Apr 2026 - 13:20

score 174 · Answer 10 · 2026-04-15 21:16:38

174

Views

Is there a shorter or more trivial way to prove that $ x > \cos (x)-\cos (2 x) $ holds for all $x>0$?

Published on 15 Apr 2026 - 21:16

score 93 · Answer 11 · 2026-04-13 17:13:29

93

Views

Examples of Intuitionistic Proof

Published on 13 Apr 2026 - 17:13

score 193 · Answer 12 · 2026-04-14 04:30:06

193

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Exercise 4, Section 32 of Munkres’ Topology

Published on 14 Apr 2026 - 4:30

score 470 · Answer 13 · 2026-04-16 00:06:55

470

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Does the question that every group of order 77 must have an element of order 7 and an element of order 11 have an elementary proof

Published on 16 Apr 2026 - 0:06

score 250 · Answer 14 · 2026-04-16 09:38:56

250

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Show the inequality $\frac{\sqrt{\pi}}{2}<\left(\pi-e\right)!$

Published on 16 Apr 2026 - 9:38

score 292 · Answer 15 · 2026-04-16 03:29:23

Alternate proof that $\cos(3A)+\cos(3B)+\cos(3C)=1-4\sin(\frac{3A}2)\sin(\frac{3B}2)\sin(\frac{3C}2)$ for $A$, $B$, $C$ the angles of a triangle

List Question

Showing that $\{S^x_{\tau \wedge n}\}_{n\in\mathbb{N}}$ is uniformly integrable

Let $a,b,c \le 0$. Then $\max(a,c)+\max(b,c) \le \max(a+b, c)$

Question on analytic continuation of the principal branch of logarithms on $B(1, 1) $

Simpler proof that $y^3[d^2y/dx^2]$ is a constant if $y^2=ax^2+bx+c$?

The intuition behind this explicit form of an affine hull?

A square on the equator of a sphere is a critical point of the electrostatic potential

Write theorem's "scratch work" in Velleman's How to prove it 'given–goal diagrams' style

There exists a ball inside the convex hull of the union of $2$ other balls

Possible ways of solving an Olympiad question

Is there a shorter or more trivial way to prove that $ x > \cos (x)-\cos (2 x) $ holds for all $x>0$?

Examples of Intuitionistic Proof

Exercise 4, Section 32 of Munkres’ Topology

Does the question that every group of order 77 must have an element of order 7 and an element of order 11 have an elementary proof

Show the inequality $\frac{\sqrt{\pi}}{2}<\left(\pi-e\right)!$

Alternate proof that $\cos(3A)+\cos(3B)+\cos(3C)=1-4\sin(\frac{3A}2)\sin(\frac{3B}2)\sin(\frac{3C}2)$ for $A$, $B$, $C$ the angles of a triangle

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