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Andrey Rekalo

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

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  • Member for 10 years, 7 months
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  • Last seen Feb 25 at 21:21

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163 Funny identities Nov 3 '10
113 Why is Euler's Gamma function the “best” extension of the factorial function to the reals? Aug 4 '10
75 Proving $\int_{0}^{\infty} \mathrm{e}^{-x^2} dx = \frac{\sqrt \pi}{2}$ Nov 7 '10
75 Volumes of n-balls: what is so special about n=5? Dec 27 '10
56 Proving that the sequence $F_{n}(x)=\sum\limits_{k=1}^{n} \frac{\sin{kx}}{k}$ is boundedly convergent on $\mathbb{R}$ Dec 8 '10
56 Different methods to compute $\sum\limits_{k=1}^\infty \frac{1}{k^2}$ (Basel problem) Nov 3 '10
44 Comparing $\pi^e$ and $e^\pi$ without calculating them Nov 8 '10
39 Proof of $\int_0^\infty \left(\frac{\sin x}{x}\right)^2 \mathrm dx=\frac{\pi}{2}.$ Dec 7 '10
36 Why have we chosen our number system to be decimal (base 10)? Nov 3 '10
30 Calculating the integral $\int_0^\infty \frac{\cos x}{1+x^2}\, \mathrm{d}x$ without using complex analysis Nov 8 '10
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