Mathematics
Vincenzo Oliva's user avatar
Vincenzo Oliva's user avatar
Vincenzo Oliva's user avatar
Vincenzo Oliva
  • Member for 9 years, 3 months
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  • Italy
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Festīnā lentē.

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question
28
Why does the sum of the reciprocals of factorials converge to $e$?
Dec 6, 2014
answer
21
Product of cosines: $ \prod_{r=1}^{7} \cos \left(\frac{r\pi}{15}\right) $
Jul 6, 2015
answer
19
A limit without invoking L'Hopital: $\lim_{x \to 0} \frac{x \cos x - \sin x}{x^2}$
Nov 23, 2016
answer
17
Zero to the zero power – is $0^0=1$?
Jun 26, 2015
answer
15
Prove that the trigonometric equation has no solution
Aug 8, 2015
question
12
Why isn't $f(x) = x\cos\frac{\pi}{x}$ differentiable at $x=0$, and how do we foresee it?
Jan 5, 2015
answer
11
How to find this infinite summation: $\sum_{n=1}^{\infty}\frac{1}{(2n-1)^2}$?
Sep 27, 2016
question
10
Proving algebraically $a^2+b^2\ge a^{\alpha}b^{2-\alpha}$ for $0\le\alpha\le2$ and $a,b\ge0$
Oct 3, 2016
question
10
Two (strictly related) proofs by induction of inequalities.
Dec 7, 2014
question
10
It is easy to show that $S_m=\sum_{n=1}^\infty \frac{n}{2^n + m}$ converges for any natural$\ m$, but what is its value?
Oct 18, 2014
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Why have I lost my ability to close a question?
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39
Did Roman unmarried men have a preferred hand and finger for wearing their seal ring?
32
Did Roman unmarried men have a preferred hand and finger for wearing their seal ring?
30
How did the ancient Romans count with their fingers?
28
"Oh no!" in Latin
23
What should the corona virus be called in Latin?

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