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Sávio
  • Member for 8 years, 9 months
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Professor at Universidade Federal de Ouro Preto (UFOP), Brazil.

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21
Prove the following limit $ \lim_{n\to \infty} (3^n + 4^n)^{1/n} = 4 $
13
Diophantine equation involving prime numbers : $p^3 - q^5 = (p+q)^2$
9
All natural number solutions for the equation $a^2+b^2=2c^2$
7
Showing $\varphi(t)\neq 0$ when $\varphi$ is a characteristic function of an infinitely divisible distribution
5
Show that there are infinitely many triples of integers $(a,b,c)$ such that $2a^2 + 3b^2 - 5c^2 = 1997$