Ian Mateus
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 17 Is $\sqrt[3]{p+q\sqrt{3}}+\sqrt[3]{p-q\sqrt{3}}=n$, $(p,q,n)\in\mathbb{N} ^3$ solvable? 16 Is this of any real importance to the mathematical scientific community? 14 Find all positive integers $n$ s.t. $3^n + 5^n$ is divisible by $n^2 - 1$ 13 Solve $x^2 + 8 = 3^n$, where $x\in\mathbb N$. 12 How to either prove or disprove if it is possible to arrange a series of numbers such the sum of any two adjacent number adds up to a prime number

### Reputation (4,045)

 +10 How can I find the fifth root of unity? +30 Sum : $\sum_{n=0}^\infty \frac{(-1)^n}{(2n+1)^3}$ +5 Is there any geometric way to characterize $e$? +5 Does a “cubic” matrix exist?

### Questions (26)

 109 Does a “cubic” matrix exist? 38 Is there any geometric way to characterize $e$? 20 Mystery about $\sum_{n\geqslant 1}2^{-n!}$ 17 $\sqrt[2]{1+\sqrt[3]{1+\sqrt[4]{1+\cdots}}}\approx 1.5176001678…$ 17 Rigorous proof that $\displaystyle\frac{1}{3} = 0.333\ldots$

### Tags (92)

 47 calculus × 19 27 elementary-number-theory × 11 37 algebra-precalculus × 16 17 harmonic-numbers × 2 30 diophantine-equations × 2 15 summation × 9 29 sequences-and-series × 16 15 inequality × 3 27 number-theory × 12 14 trigonometry × 6

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 Mathematics 4,045 rep 21748 Area 51 201 rep 4 Portuguese Language 191 rep 3 Biology 138 rep 14 Stack Overflow em Português 101 rep 2