The field of rationals is the set of rational numbers, which form a field. This field is commonly denoted (doublestruck Q).
Field of Rationals
See also
Field, Q, Rational Number, RationalsExplore with Wolfram|Alpha
Cite this as:
Weisstein, Eric W. "Field of Rationals." From MathWorld--A Wolfram Web Resource. https://mathworld.wolfram.com/FieldofRationals.html