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Top Questions
9
votes
Let $G$ be a group and let $S$ be a subset such that if $a\in S$ then $a^{-1}\not \in S$.
group-theory
asked Feb 14, 2019 at 5:01
math.stackexchange.com
7
votes
A Diophantine Equation related to arithmetic progression: $T_n=a^n+b^n+c^n$.
number-theory
square-numbers
arithmetic-progressions
asked Oct 11, 2019 at 10:26
math.stackexchange.com
6
votes
The Proof of Infinitude of Pythagorean Triples $(x,x+1,z)$
elementary-number-theory
diophantine-equations
pythagorean-triples
asked Apr 21, 2018 at 6:36
math.stackexchange.com
6
votes
Finding a closed form for $I_n=\int_0^1 \prod_{l=1}^n\left[x^2-\frac{l^2}{n^2}\right]dx$
calculus
integration
asked Jan 18, 2019 at 13:10
math.stackexchange.com
5
votes
How many solution does $1/a+1/b+1/c+1/d=1$ have?
algebra-precalculus
diophantine-equations
asked Apr 21, 2018 at 4:58
math.stackexchange.com
Top Answers
5
If $pqr(p+q+r)$ is a square and $p,q,r$ are primes, then what's the maximum value of $p+q+r$?
math.stackexchange.com
5
Evaluation of the sum $\sum\limits_{n=1}^{\infty}\frac1n\sin\frac1n$
math.stackexchange.com
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