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coefficientRing(RationalMap) -- coefficient ring of a rational map

Synopsis

Function: coefficientRing
Usage:

coefficientRing phi
Inputs:
- phi, a rational map
Outputs:
- a ring, the coefficient ring of phi

See also

RationalMap ** Ring -- change the coefficient ring of a rational map

Ways to use this method:

coefficientRing(RationalMap) -- coefficient ring of a rational map