Mathematics
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Andrey Rekalo
  • Member for 11 years, 9 months
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All Questions Answers
Score Newest
answer
166
Funny identities
Nov 3, 2010
answer
119
Why is Euler's Gamma function the "best" extension of the factorial function to the reals?
Aug 4, 2010
question
80
Volumes of n-balls: what is so special about n=5?
Dec 27, 2010
answer
79
Proving $\int_{0}^{\infty} \mathrm{e}^{-x^2} dx = \frac{\sqrt \pi}{2}$
Nov 7, 2010
answer
60
Different methods to compute $\sum\limits_{k=1}^\infty \frac{1}{k^2}$ (Basel problem)
Nov 3, 2010
answer
57
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
46
Comparing $\pi^e$ and $e^\pi$ without calculating them
Nov 8, 2010
answer
41
Proof of $\int_0^\infty \left(\frac{\sin x}{x}\right)^2 \mathrm dx=\frac{\pi}{2}.$
Dec 7, 2010
answer
38
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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106
Video lectures and presentations on quantitative finance
91
Elementary+Short+Useful
85
Suggestions for good notation
67
Why do we care about $L^p$ spaces besides $p = 1$, $p = 2$, and $p = \infty$?
64
Determinant of sum of positive definite matrices

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