Category(V) : RngVal -> Cat
Parent(V) : RngVal -> Pow
PrimeRing(V) : RngVal -> RngVal
Center(V) : RngVal -> RngVal
Return field of fractions of the valuation ring V, which is the
rational field or the function field from which V was created.
Characteristic(V) : RngVal -> RngIntElt
V2.28, 13 July 2023