Mathematics
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ex.nihil
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All Questions Answers
Score Newest
question
7
Prove that $A$ is dense if and only if any non-empty open set in $X$ has an intersection with $A$
Feb 22, 2018
question
6
Prove $R(a \times b) = Ra \times Rb$ given $R \in \mathcal{SO}(3)$ and $a,b \in \mathbb{R}^3$.
Sep 29, 2019
question
6
Does the form $XAX^\top$ have a name?
Sep 24, 2019
question
5
How far (for which $p$) can we generalize $\int x^p \mathrm{d}x=\frac{x^{p+1}}{p+1} + C,p\neq-1 $?
Mar 15, 2020
question
4
Prove that a cone is convex if and only if it is closed under addition.
Sep 9, 2018
answer
4
Why is $\frac{dy}{d(ax)}$ = $\frac{1}{a}\frac{dy}{dx}$?
Dec 29, 2018
question
3
At what point does a topological space become a geometric one?
Jul 30, 2020
question
3
Geometric definition of the dot product in $n$-dimensional vector spaces
Mar 26, 2020
question
3
Prove that $X$ is a complete metric space if every closed ball in $X$ is compact.
Apr 10, 2018
question
3
Uses of nonsmooth analysis in mathematical research
Dec 21, 2019

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