List questions from proof-explanation

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Arnold's proof of Abel's theorem

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When do differential operators commute?

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Convergence of composition of functions in $L^p$

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Question about the proof of the fact that minimum is attained for a l.s.c. convex function over a convex compact set.

Published on 11 Apr 2026 - 1:13

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Disproving existence statements

Published on 10 Apr 2026 - 2:21

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achievability of average

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How do you prove that any two integers will always have a greatest common divisor?

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Transpose of the reduced row echelon form

Published on 15 Apr 2026 - 14:19

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Proving that $\lceil f(x) \rceil$ $=$ $\lceil f(\lceil x \rceil )\rceil$ when $f(x) =$ integer $\implies x =$ integer

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How we can show $\mathbb{E}[T]=0$ and $\operatorname{Var}(T)=\frac{n}{n-2}$.

Published on 15 Apr 2026 - 0:23

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Understanding a projection function from S to B.

Published on 09 Apr 2026 - 7:01

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Need help with proof about Diophantine equations

Published on 09 Apr 2026 - 10:39

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How to prove this using laws?

Published on 09 Apr 2026 - 23:48

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Why is $<T\vec x,\vec y>=<\vec x,T^*\vec y>$ for hermitian matrix T?

Published on 16 Apr 2026 - 22:12

List Question

Show that the equation of motion for a particle on Norton's Dome is $\frac{d^2 r}{dt^2}=r^{1/2}$

Arnold's proof of Abel's theorem

When do differential operators commute?

Convergence of composition of functions in $L^p$

Question about the proof of the fact that minimum is attained for a l.s.c. convex function over a convex compact set.

Disproving existence statements

achievability of average

How do you prove that any two integers will always have a greatest common divisor?

Transpose of the reduced row echelon form

Proving that $\lceil f(x) \rceil$ $=$ $\lceil f(\lceil x \rceil )\rceil$ when $f(x) =$ integer $\implies x =$ integer

How we can show $\mathbb{E}[T]=0$ and $\operatorname{Var}(T)=\frac{n}{n-2}$.

Understanding a projection function from S to B.

Need help with proof about Diophantine equations

How to prove this using laws?

Why is $<T\vec x,\vec y>=<\vec x,T^*\vec y>$ for hermitian matrix T?

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