View source for Number field

A '''number field''' is a finite degree [[field extension]] of the field <math>\mathbb{Q}</math> of [[Rational number|rational numbers]]. 

The study of algebraic number fields, and, more generally, of algebraic extensions of the field of rational numbers, is the central topic of [[:en:Algebraic_number_theory|algebraic number theory]].
[[Category:Algebraic number theory]]