This function brings the variables of a particular NCRing in scope. For an illustration:
i1 : A = QQ{x,y,z} o1 = A o1 : NCPolynomialRing |
i2 : coefficientRing A o2 = QQ o2 : Ring |
i3 : B = skewPolynomialRing(QQ,(-1)_QQ,{x,y,z}) --Calling Bergman for NCGB calculation. Complete! o3 = B o3 : NCQuotientRing |
i4 : x o4 = x o4 : B |
As you can see, at this point the interpreter treats x,y and z as elements of B. To go back to A, we run the command use A:
i5 : use A o5 = A o5 : NCPolynomialRing |
i6 : x o6 = x o6 : A |