Question

Counterexample to Davydov inequality for strictly stationary mixing sequence

score 92 · Answer 1 · 2026-03-26 04:51:56

92

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Counterexample to Davydov inequality for strictly stationary mixing sequence

Published on 26 Mar 2026 - 4:51

score 60 · Answer 2 · 2020-04-11 16:28:15

60

Views

Given $\cos C(\sin A +\sin B)=\sin C \cos(A-B)$, prove that triangle $ABC$ is equilateral.

Published on 11 Apr 2020 - 16:28

score 655 · Answer 3 · 2026-03-29 18:31:07

655

Views

Example of a Bounded Linear Operator with Unbounded Spectrum.

Published on 29 Mar 2026 - 18:31

score 132 · Answer 4 · 2026-04-01 08:56:39

132

Views

Wilson's Theorem for Groups in the non-Abelian setting

Published on 01 Apr 2026 - 8:56

score 60 · Answer 5 · 2020-04-14 10:56:38

60

Views

Existence of a Continuous Surjection from $\mathbb{R}^n$ onto $(-1,1)^n - \{0\}$?

Published on 14 Apr 2020 - 10:56

score 91 · Answer 6 · 2026-03-28 04:35:07

91

Views

Are connected Lie groups classified by their Lie algebras and fundamental groups?

Published on 28 Mar 2026 - 4:35

score 888 · Answer 7 · 2026-03-28 11:53:00

888

Views

Proving a theorem using its converse

Published on 28 Mar 2026 - 11:53

score 1.1k · Answer 8 · 2026-03-31 17:36:06

1.1k

Views

Let R1 and R2 be two equivalence relations on X.prove that whether R1UR2 is an equivalence relation on X if R1UR2 ⊆ R1 o R2.

Published on 31 Mar 2026 - 17:36

score 74 · Answer 9 · 2026-03-25 17:36:04

74

Views

Prove some inequality using Jensen's inequality

Published on 25 Mar 2026 - 17:36

score 146 · Answer 10 · 2020-04-16 12:01:08

146

Views

If $A, B$ forms a separation of $X$, does $A \cap Y$ and $B \cap Y$ forms a separation of Y when they are non-empty?

Published on 16 Apr 2020 - 12:01

score 49 · Answer 11 · 2020-04-16 19:55:04

49

Views

If $X$ has a open-closed base $\mathcal{B}$ and if $|X|>1$ then $X$ is not locally connected

Published on 16 Apr 2020 - 19:55

score 136 · Answer 12 · 2020-04-17 14:04:29

136

Views

Does a concave increasing function that goes through the origin always have a diminishing elasticity?

Published on 17 Apr 2020 - 14:04

score 110 · Answer 13 · 2026-03-27 04:35:14

110

Views

Conjecture on a functional equality and nested radical of Ramanujan :$3=\sqrt{1+f(2)\sqrt{1+f(3)\sqrt{1+\cdots}}}$

Published on 27 Mar 2026 - 4:35

score 126 · Answer 14 · 2026-03-25 10:21:47

126

Views

What can I say about the terms of the sequence of partial sums $\{S_k \}$ of the conditionally convergent series $\sum\limits_{n=1}^{\infty} a_n$?

Published on 25 Mar 2026 - 10:21

score 79 · Answer 15 · 2026-03-28 22:28:16

79

Views

Non normality of the tangent disk topology using Baire Category Theorem

Published on 28 Mar 2026 - 22:28

List Question

Counterexample to Davydov inequality for strictly stationary mixing sequence

Given $\cos C(\sin A +\sin B)=\sin C \cos(A-B)$, prove that triangle $ABC$ is equilateral.

Example of a Bounded Linear Operator with Unbounded Spectrum.

Wilson's Theorem for Groups in the non-Abelian setting

Existence of a Continuous Surjection from $\mathbb{R}^n$ onto $(-1,1)^n - \{0\}$?

Are connected Lie groups classified by their Lie algebras and fundamental groups?

Proving a theorem using its converse

Let R1 and R2 be two equivalence relations on X.prove that whether R1UR2 is an equivalence relation on X if R1UR2 ⊆ R1 o R2.

Prove some inequality using Jensen's inequality

If $A, B$ forms a separation of $X$, does $A \cap Y$ and $B \cap Y$ forms a separation of Y when they are non-empty?

If $X$ has a open-closed base $\mathcal{B}$ and if $|X|>1$ then $X$ is not locally connected

Does a concave increasing function that goes through the origin always have a diminishing elasticity?

Conjecture on a functional equality and nested radical of Ramanujan :$3=\sqrt{1+f(2)\sqrt{1+f(3)\sqrt{1+\cdots}}}$

What can I say about the terms of the sequence of partial sums $\{S_k \}$ of the conditionally convergent series $\sum\limits_{n=1}^{\infty} a_n$?

Non normality of the tangent disk topology using Baire Category Theorem

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