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Mathematics
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Andrey Rekalo

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

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  • Member for 8 years, 9 months
  • 717 profile views
  • Last seen Apr 29 at 19:01

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Top posts (35) All Questions Answers | Votes Newest

154 Funny identities Nov 3 '10
98 Why is Euler's Gamma function the “best” extension of the factorial function to the reals? Aug 4 '10
70 Proving $\int_{0}^{\infty} \mathrm{e}^{-x^2} dx = \frac{\sqrt \pi}{2}$ Nov 7 '10
69 Volumes of n-balls: what is so special about n=5? Dec 27 '10
50 Different methods to compute $\sum\limits_{k=1}^\infty \frac{1}{k^2}$ (Basel problem) Nov 3 '10
48 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
38 Comparing $\pi^e$ and $e^\pi$ without calculating them Nov 8 '10
34 Why have we chosen our number system to be decimal (base 10)? Nov 3 '10
31 Proof of $\int_0^\infty \left(\frac{\sin x}{x}\right)^2 \mathrm dx=\frac{\pi}{2}.$ Dec 7 '10
29 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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