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Fermat
fermate
Fermat's principle
The link between ray optics and wave optics, stating (in its original strong form) that the path taken by a ray between two given points is the path that can be travelled in the least time, or (in a weaker form that is true for all cases) in a time that is "stationary" with respect to variations of the path — so that a deviation in the path causes, at most, a second-order change in the traversal time.
Fermat prime
(number theory) A Fermat number that is prime.
Fermat pseudoprime
(mathematics) With respect to an integer base b, with b > 1, a composite integer n such that bⁿ⁻¹ is congruent to one modulo n.
Fermat number
(number theory) An integer which is one more than two raised to a power which is itself a power of two (i.e., is expressible in the form 2^(2ⁿ)+1 for some n>0); equivalently, a number that is one more than two raised to some power (is expressible as 2ⁿ+1) and is prime.
Fermat numbers
plural of Fermat number
Fermat curve
(mathematics) The algebraic curve in the complex projective plane defined in homogeneous coordinates (X:Y:Z) by the Fermat equation.
Fermat equation
(mathematics) The equation Xⁿ+Yⁿ=Zⁿ, which defines a Fermat curve.
Fermat curves
plural of Fermat curve