MathDB
Problems
Contests
International Contests
Baltic Way
1990 Baltic Way
13
13
Part of
1990 Baltic Way
Problems
(1)
Quadratic Diophantine Equation with infinitely many solution
Source:
4/19/2013
Show that the equation
x
2
ā
7
y
2
=
1
x^2-7y^2 = 1
x
2
ā
7
y
2
=
1
has infinitely many solutions in natural numbers.
quadratics