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individ
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All Questions Answers
Score Newest
answer
4
When is $f(a,b)=\frac{a^2+b^2}{1+ab}$ a perfect square rational number?
Sep 20, 2016
answer
3
Size of set of integers with all sums of two distinct elements giving squares
Nov 13, 2021
answer
3
Solution to a Diophantine equation
Jul 11, 2017
answer
3
Rational solutions of the Fermat equation $X^n+Y^n+Z^n=1$
Dec 15, 2015
answer
2
What is known about a^2 + b^2 = c^2 + d^2
Mar 5, 2014
answer
2
When is $f(a,b)=\frac{a^2+b^2}{1+ab}$ a perfect square rational number?
Sep 18, 2016
answer
2
Fricke Klein method for isotropic ternary quadratic forms
Dec 13, 2015
answer
1
Question on a crucial lemma in Euler's approach to Fermat's Last Theorem for $n=3$
May 9
answer
1
Solve in integers: $y(x^2+1)=z^2+1$
Jan 29, 2022
answer
1
Diophantine equation: $n^2=c(4ab-a-b)-b$?
Jul 18, 2019
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12
If $n = a^2 + b^2 + c^2$ for positive integers $a$, $b$,$c$, show that there exist positive integers $x$, $y$, $z$ such that $n^2 = x^2 + y^2 + z^2$.
10
Find a solution: $3(x^2+y^2+z^2)=10(xy+yz+zx)$
8
How to find all rational solutions of $\ x^2 + 3y^2 = 7 $?
7
$x^2+y^2=2z^2$, positive integer solutions
6
Integer solutions for $\frac{1}{x^2}+\frac{1}{y^2}=\frac{1}{z^2}$?

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