Fermat's theorem (disambiguation)

The mathematician Pierre de Fermat made many important discoveries in his career. Multiple theorems are named after him.

 Theorems named after Fermat 
In number theory:
 Fermat's Last Theorem, a conjecture on integers 
 Fermat's little theorem, on prime numbers in modular arithmetic
 Fermat's theorem on prime sums of squares, on what prime numbers can or can't be written as sums of perfects quares
 Fermat's polygonal number theorem, on integers as sum of polygonal numbers
 Fermat's right triangle theorem, on squares not being the difference of fourth powers

In calculus:
 Fermat's theorem (stationary points), on the value of the derivative at maximum and minimum points

In optics:
 Fermat's principle, an explanation of refraction

Category:Mathematics
Category:Physics