use(NCRing) -- Brings the variables of a particular NCRing in scope

Synopsis

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