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BrazilianAeronautics

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

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3 Inequality involving AM - GM: $\sum_{i=1}^n \frac{1}{1+a_i} \ge \frac{n}{1+{{(a_1.a_2…a_n)}}^{1/n}}$ Apr 20 '17
3 Verify if the following set is open or not Apr 13 '20
3 “Differential Operator” Over Polynomial Space Jul 10 '20
2 Defining a general structure of “Calculus” [closed] Jul 13 '20
2 Analytic Function such that $f(2z) = 4\,f(z)$ Jan 25
2 Some questions about trigonometric polynomials, Vieta's relations and correct integer parameters for roots Jul 16 '18
2 How one can prove $\prod_{k=1}^{n-1} (\cos\theta-\cos(k\pi/n)) = 2^{1-n}\sin(n\theta)\csc\theta$? Jan 6 '18
1 If $n>3$ prove that $\sum_{k=0}^{n-1} (k-n)\cos\frac{2k\pi}{n}=\frac{n}{2}$. Jan 11 '17
1 Inequality involving AM-GM Feb 14 '17
1 Weird natural numbers function problem Sep 7 '18
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