4.1.1.14 Fields Objects

class Fields
The category of fields.

sage: K = Fields()
sage: K
Category of fields
sage: K(IntegerRing())
Rational Field
sage: K(PolynomialRing(GF(3)))
Fraction field of Univariate Polynomial Ring in x over Finite field of size
3
sage: K(RealField())
Real Field with 53 bits of precision
Instances of class Fields also have the following special methods:

__call__,$  $ __contains__

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