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Salech Alhasov

Mozart - Oboe Concerto in C, K. 314 / K. 271k.

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74 Theorem that von Neumann proved in five minutes. Feb 1 '14
40 Is there a $\sigma$-algebra on $\mathbb{R}$ strictly between the Borel and Lebesgue algebras? May 7 '12
40 Proving $\int_{0}^{\infty} \mathrm{e}^{-x^2} dx = \frac{\sqrt \pi}{2}$ Apr 4 '12
38 Why is the Cartesian product of a set $A$ and empty set an empty set? Feb 16 '13
12 Finding $\lim\limits_{x\to 0}\frac{\sin{3x}}{x}$ May 10 '12
12 Proving that $\sum_{k=0}^{\infty}\frac{1}{(k+1)(2k+1)(4k+1)}=\frac{\pi}{3}$ Dec 10 '13
11 How can I understand and prove the “sum and difference formulas” in trigonometry? Jan 4 '14
10 Triangle inequality for subtraction? Oct 15 '12
9 If $f'$ is bounded, then $f$ is uniformly continuous Apr 1 '12
8 How to prove gcd of consecutive Fibonacci numbers is 1? Oct 16 '12
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