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John Nash

Apparently, this user prefers to keep an air of mystery about them.

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  • Member for 3 years, 8 months
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  • Last seen 6 hours ago

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4 Let $f,g : X\to X$ be real continuous functions such that $f(X)\cap g(X) = \emptyset$ and $f(X)\cup g(X) = X$. Which sets cannot be equal to $X$? Nov 17 '18
4 A question about a limit Feb 7
3 Show each infinite set $S \subset \mathbb R$ contains a countably infinite subset Sep 8 '20
3 (dis)prove: M compact if and only if every closed ball in M in compact. Oct 10 '20
3 If A is a countable set, how can I show that A has countably many finite subsets? Feb 4
3 Find all continuous $f$ that $f(xy) = xf(y) + yf(x)$. May 30 '20
3 Convergence of infinite series of log function Jul 11 '20
3 Series convergence radius proximity Aug 18 '20
2 $\mathbb{R} \setminus \{ 0 \} $ direct product Sep 21 '20
2 Prove that $13\sqrt{2}$ is irrational. Jul 15 '20
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