Mathematics
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Andrey Rekalo's user avatar
Andrey Rekalo's user avatar
Andrey Rekalo
  • Member for 13 years, 4 months
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All Questions Answers
Score Newest
answer
168
Funny identities
Nov 3, 2010
answer
123
Why is Euler's Gamma function the "best" extension of the factorial function to the reals?
Aug 4, 2010
question
86
Volumes of n-balls: what is so special about n=5?
Dec 27, 2010
answer
80
Evaluation of Gaussian integral $\int_{0}^{\infty} \mathrm{e}^{-x^2} dx$
Nov 7, 2010
answer
63
The Basel problem
Nov 3, 2010
answer
59
Proving that the sequence $F_{n}(x)=\sum\limits_{k=1}^{n} \frac{\sin{kx}}{k}$ is boundedly convergent on $\mathbb{R}$
Dec 8, 2010
answer
45
Comparing $\pi^e$ and $e^\pi$ without calculating them
Nov 8, 2010
answer
42
Proof of $\int_0^\infty \left(\frac{\sin x}{x}\right)^2 \mathrm dx=\frac{\pi}{2}.$
Dec 7, 2010
answer
39
Why have we chosen our number system to be decimal (base 10)?
Nov 3, 2010
answer
31
Calculating the integral $\int_0^\infty \frac{\cos x}{1+x^2}\, \mathrm{d}x$ without using complex analysis
Nov 8, 2010
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110
Video lectures and presentations on quantitative finance
91
Elementary+Short+Useful
87
Suggestions for good notation
69
Why do we care about $L^p$ spaces besides $p = 1$, $p = 2$, and $p = \infty$?
65
Determinant of sum of positive definite matrices

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