Question

Example of restricted Lie algebras

score 68 · Answer 1 · 2023-10-30 10:16:09

68

Views

Example of restricted Lie algebras

Published on 30 Oct 2023 - 10:16

score 71 · Answer 2 · 2023-10-31 22:51:11

71

Views

Need of hypothesis and counter-example

Published on 31 Oct 2023 - 22:51

score 264 · Answer 3 · 2023-11-01 20:57:32

264

Views

Showing $\frac{[\sin y \ (x+\frac{1}{x}-2\cos y)]^2}{x^2+6} \leq 1$ for $x>1$

Published on 01 Nov 2023 - 20:57

score 65 · Answer 4 · 2026-04-04 15:21:30

65

Views

Does two primitive $n$th roots of unity have the same minimal polynomial over a finite field of characteristic $p>0$.

Published on 04 Apr 2026 - 15:21

score 39 · Answer 5 · 2026-03-25 15:12:11

39

Views

For conditionally convergent series $\sum a_n,\exists (m_n)_{n\in\mathbb{N}}$ with $(n-1)k<m_n\leq n k,$ s.t. $\sum_{n\in\mathbb{N}} a_{m_n}=\alpha.$

Published on 25 Mar 2026 - 15:12

score 83 · Answer 6 · 2023-11-04 12:49:10

83

Views

An example of $u \notin H^2 (\mathbb R)$ with $\int u \varphi'' = \int v \varphi$ for all $\varphi \in C^\infty_c (\mathbb R)$

Published on 04 Nov 2023 - 12:49

score 112 · Answer 7 · 2023-11-07 10:28:55

112

Views

Function which takes on every value in $[0,1]$ an infinite number of times.

Published on 07 Nov 2023 - 10:28

score 40 · Answer 8 · 2026-03-25 14:19:58

40

Views

Question regarding behaviour of equidistributed sequences.

Published on 25 Mar 2026 - 14:19

score 86 · Answer 9 · 2026-03-26 21:10:20

86

Views

On the adjointness of the inclusion and the zero-homology functor

Published on 26 Mar 2026 - 21:10

score 84 · Answer 10 · 2026-04-03 13:14:29

84

Views

Analytic functions such that $\sum_{n=2}^{\infty} f(n) \left( \zeta(n)-1 \right)$ can be evaluated, but $\sum_{n=2}^{\infty} f(n)$ can't

Published on 03 Apr 2026 - 13:14

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 36 · Answer 12 · 2026-03-29 04:01:46

36

Views

A non-open evenly covered subset?

Published on 29 Mar 2026 - 4:01

score 60 · Answer 13 · 2026-03-30 15:44:23

60

Views

Is the sum of minimum distances of a bounded sequence in $\mathbb{R}^d$ convergent?

Published on 30 Mar 2026 - 15:44

score 33 · Answer 14 · 2026-03-26 19:20:13

33

Views

Solution of PDE on Lipschitz domain which is in $\{ u \in H^1_0 : \Delta u \in L^2\}$ but not in $H^2$

Published on 26 Mar 2026 - 19:20

score 86 · Answer 15 · 2023-11-16 18:45:36

86

Views

If the composition of two functions is differentiable, and one of them is differentiable, must the second one also be differentiable?

Published on 16 Nov 2023 - 18:45

List Question

Example of restricted Lie algebras

Need of hypothesis and counter-example

Showing $\frac{[\sin y \ (x+\frac{1}{x}-2\cos y)]^2}{x^2+6} \leq 1$ for $x>1$

Does two primitive $n$th roots of unity have the same minimal polynomial over a finite field of characteristic $p>0$.

For conditionally convergent series $\sum a_n,\exists (m_n)_{n\in\mathbb{N}}$ with $(n-1)k<m_n\leq n k,$ s.t. $\sum_{n\in\mathbb{N}} a_{m_n}=\alpha.$

An example of $u \notin H^2 (\mathbb R)$ with $\int u \varphi'' = \int v \varphi$ for all $\varphi \in C^\infty_c (\mathbb R)$

Function which takes on every value in $[0,1]$ an infinite number of times.

Question regarding behaviour of equidistributed sequences.

On the adjointness of the inclusion and the zero-homology functor

Analytic functions such that $\sum_{n=2}^{\infty} f(n) \left( \zeta(n)-1 \right)$ can be evaluated, but $\sum_{n=2}^{\infty} f(n)$ can't

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

A non-open evenly covered subset?

Is the sum of minimum distances of a bounded sequence in $\mathbb{R}^d$ convergent?

Solution of PDE on Lipschitz domain which is in $\{ u \in H^1_0 : \Delta u \in L^2\}$ but not in $H^2$

If the composition of two functions is differentiable, and one of them is differentiable, must the second one also be differentiable?

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