Guy Terjanian

Guy Terjanian is a French mathematician who has worked on algebraic number theory. He achieved his Ph.D under Claude Chevalley in 1966, and at that time published a counterexample to the original form of a conjecture of Emil Artin, which suitably modified had just been proved as the Ax-Kochen theorem. He is ethnically Armenian.
In 1977, he proved that if p is an odd prime number, and the natural numbers x, y and z satisfy




x

2
p


+

y

2
p


=

z

2
p




{\displaystyle x^{2p}+y^{2p}=z^{2p}}
, then 2p must divide x or y.