In 2011, Suvarnamani, Singta and Chotchaisthit [11] proved that no non- negative integer solution for the two Diophantine equations 4x + 7y = z2 and 4x + 11y = z2 where x, y and z are non-negative integers.
In 2011, Suvarnamani, Singta and Chotchaisthit [11] proved that no non-negative integer solution for the two Diophantine equations 4x + 7y = z2 and4x + 11y = z2 where x, y and z are non-negative integers.