List questions from alternative-proof

Published on 29 Mar 2026 - 19:56

211

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How to show that $\theta(A):=A\cup\operatorname{bd}A$ is a kuratowski operator?

Published on 03 Feb 2020 - 19:14

48

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Show that $f$ is still integrable after altering it at one point

Published on 03 Feb 2020 - 20:01

581

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Non-abelian finite group $G$ has at least 2 conjugacy classes which contain at least 2 elements

Published on 04 Feb 2020 - 11:32

83

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If $H,K$ are subgroups of $G$ s.t. $o(H), o(K)$ are relativily prime $\implies H \cap K = \{ e \}$.

Published on 05 Feb 2020 - 5:07

157

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If $T$ is compact and self-adjoint then $S^3=T$ for some $S$ compact and self-adjoint

Published on 05 Feb 2020 - 6:33

3.2k

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What is $x$ if $x^{x^x} = {(1/2)}^{\sqrt 2}$?

Published on 05 Feb 2020 - 16:11

146

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Computing $\sum_{n=1}^\infty\frac{(-1)^{n-1}H_n^{(2)}}{(2n+1)^4}$

Published on 27 Mar 2026 - 6:10

44

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Proof verification of a property of greatest integer function

Published on 06 Feb 2020 - 17:20

38

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Topologizing a domain solution trial.

Published on 07 Feb 2020 - 2:34

44

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Do we need a subbase for topologizing a target?

Published on 07 Feb 2020 - 11:50

60

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Alternative Reduction Formula for $\int\cos^n{x}\,dx$

Published on 25 Mar 2026 - 20:35

68

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Prove that the following function is differentiable (Spivak's book)

Published on 09 Feb 2020 - 5:05

57

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Another proof of ${\bf cof \; T}^T$ = $({\bf cof \; T)}^T$

Published on 29 Mar 2026 - 9:11

57

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Non-inductive solution to this probability riddle?

Published on 11 Feb 2020 - 7:31

List Question

Justification for divisor of $(2n)!$

How to show that $\theta(A):=A\cup\operatorname{bd}A$ is a kuratowski operator?

Show that $f$ is still integrable after altering it at one point

Non-abelian finite group $G$ has at least 2 conjugacy classes which contain at least 2 elements

If $H,K$ are subgroups of $G$ s.t. $o(H), o(K)$ are relativily prime $\implies H \cap K = \{ e \}$.

If $T$ is compact and self-adjoint then $S^3=T$ for some $S$ compact and self-adjoint

What is $x$ if $x^{x^x} = {(1/2)}^{\sqrt 2}$?

Computing $\sum_{n=1}^\infty\frac{(-1)^{n-1}H_n^{(2)}}{(2n+1)^4}$

Proof verification of a property of greatest integer function

Topologizing a domain solution trial.

Do we need a subbase for topologizing a target?

Alternative Reduction Formula for $\int\cos^n{x}\,dx$

Prove that the following function is differentiable (Spivak's book)

Another proof of ${\bf cof \; T}^T$ = $({\bf cof \; T)}^T$

Non-inductive solution to this probability riddle?

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