Mathematics
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Pure mathematics exist by themselves; no will produces them, no power can limit them.

They are eternal laws that no man can infringe, and from which it is impossible to escape.

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27 Can a countable group have uncountably many subgroups? Oct 13 '14
24 Composition of two Riemann integrable functions Dec 10 '14
24 Suppose that $f ' (x)$ exists and $f(x)$ has two roots $x_1$ and $x_2$. Try to prove that: Nov 25 '14
15 Is it necessary for one to understand analysis? Apr 7 '15
15 Show that every compact metrizable space has a countable basis Feb 6 '16
14 Countable number of subgroups $\implies $ countable group Nov 13 '15
14 If every absolutely convergent series is convergent then $X$ is Banach Mar 11 '16
14 Show that $(R/I)[x]\cong R[x]/I[x]$. Sep 2 '16
14 Show that an open linear map between normed spaces is surjective. Jan 17 '17
14 Prove that the center of G has order divisible by p Feb 6 '17
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