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mechanodroid

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44 Shortest distance around a pyramid Jul 11 '19
24 How to prove that $x^2+y^2+z^2=14^n$ holds for distinct integers $x,y,z$ for every natural $n$? Jun 30 '18
22 Why not include as a requirement that all functions must be continuous to be differentiable? Jun 20 '18
15 Is every norm increasing? Jun 22 '18
14 How to prove that $x^2 +1 \geq 2x$? Sep 10 '17
13 Show that a subspace of $c_{0}$ with the norm induced by $c_{0}$, can’t be isomorphic to $l_1$. Jan 2 '19
12 Prove that all three roots of $f(x)=0$ are zero. Also prove that $a+b+c=0$. Jul 26 '18
11 Computing $e^{tA}$, where $A$ is a matrix Jun 10 '18
11 Intuitively, why are the two limit definitions of $e^x$ equivalent? Jul 11 '19
11 How to determine the $\lim_{n\to \infty} \frac{1+2^2+\ldots+n^n}{n^n}=1$. Sep 11 '17
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