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Salech Alhasov's user avatar
Salech Alhasov's user avatar
Salech Alhasov's user avatar
Salech Alhasov
  • Member for 12 years, 5 months
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Mozart - Oboe Concerto in C, K. 314 / K. 271k.

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81
Theorem that von Neumann proved in five minutes.
Feb 1, 2014
55
Why is the Cartesian product of a set $A$ and empty set an empty set?
Feb 16, 2013
45
Evaluation of Gaussian integral $\int_{0}^{\infty} \mathrm{e}^{-x^2} dx$
Apr 4, 2012
42
Is there a $\sigma$-algebra on $\mathbb{R}$ strictly between the Borel and Lebesgue algebras?
May 7, 2012
20
How can I understand and prove the "sum and difference formulas" in trigonometry?
Jan 4, 2014
12
Finding $\lim\limits_{x\to 0}\frac{\sin{3x}}{x}$
May 10, 2012
12
Proving that $\sum_{k=0}^{\infty}\frac{1}{(k+1)(2k+1)(4k+1)}=\frac{\pi}{3}$
Dec 10, 2013
11
Triangle inequality for subtraction?
Oct 15, 2012
10
If $f'$ is bounded, then $f$ is uniformly continuous
Apr 1, 2012
9
How to prove gcd of consecutive Fibonacci numbers is 1?
Oct 16, 2012
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Creating multiplication table of symmetric group S_3