R = rNP.baseRing
The base ring kk[s,t] which is the coordinate ring of PP^1.
i1 : kk=ZZ/101;
i2 : g=1;
i3 : rNP=randNicePencil(kk,g);
i4 : R=rNP.baseRing o4 = R o4 : PolynomialRing
The object baseRing is a symbol.