# Ian

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 15 Is this of any real importance to the mathematical scientific community? 15 Is $\sqrt[3]{p+q\sqrt{3}}+\sqrt[3]{p-q\sqrt{3}}=n$, $(p,q,n)\in\mathbb{N} ^3$ solvable? 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 12 Find all positive integers $n$ s.t. $3^n + 5^n$ is divisible by $n^2 - 1$

# 3,168 Reputation

 +10 Does a “cubic” matrix exist? +10 Why does the series $\frac 1 1 + \frac 12 + \frac 13 + \cdots$ not converge? +10 Mixed number fractions vs regular fractions? $3\frac{1}{6}-1\frac{11}{12}$ +10 Is $\sqrt[3]{p+q\sqrt{3}}+\sqrt[3]{p-q\sqrt{3}}=n$, $(p,q,n)\in\mathbb{N} ^3$ solvable?

# 25 Questions

 92 Does a “cubic” matrix exist? 33 Is there any geometric way to characterize $e$? 20 Mystery about $\sum_{n\geqslant 1}2^{-n!}$ 17 Rigorous proof that $\displaystyle\frac{1}{3} = 0.333\ldots$ 15 Evaluating $\sum_{k=1}^{\infty}\frac{\sin\left(k\theta\right)}{k^{2u+1}}$ with multiple integrals

# 73 Tags

 35 algebra-precalculus × 16 18 summation × 8 33 calculus × 13 16 homework × 6 33 elementary-number-theory × 6 15 inequality × 2 28 diophantine-equations × 2 14 sequences-and-series × 14 19 number-theory × 10 14 trigonometry × 6

# 4 Accounts

 Mathematics 3,168 rep 11344 Area 51 201 rep 4 Biology 133 rep 3 Stack Overflow em Português 101 rep 2