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59 How to write a good mathematical paper? Aug 11 '12
48 How to prove every closed interval in R is compact? Apr 21 '13
33 How to show that the product of two irrational numbers may be irrational? Oct 24 '14
17 Can someone explain how $\frac{\tan x}{\sec x}=\sin x$? Oct 3 '14
12 I want to know why $\omega \neq \omega+1$. [closed] Jan 12 '12
12 What's application of Bernstein Set? Jul 12 '12
12 Let $Y$ be an ordered set in the order topology with $f,g:X\rightarrow Y$ continuous, show that $\{x:f(x)\leq g(x)\}$ is closed in $X$ Jul 2 '12
11 How to find the limit of a function at infinity Oct 24 '14
11 Show $1/(1+ x^2)$ is uniformly continuous on $\Bbb R$. Oct 30 '14
10 What is the value of the integral$\int_{0}^{+\infty} \frac{1-\cos t}{t} \, e^{-t} \, \mathrm{d}t$? Jun 5 '14
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