Diophantine equation
From Citizendium, the Citizens' Compendium
A Diophantine equation, named after the Ancient Greek mathematician Diophantus, is an equation in any number of variables that only admits solutions from the ring of integers,
. Their study forms a part of the branch of mathematics known as number theory.
Of particular interest are linear Diophantine equations, of the form
, which may be solved by means of the extended Euclidean algorithm.

