-- -*- M2-comint -*- hash: 6905342508494779584

i1 : R = QQ[a,b,c,d]

o1 = R

o1 : PolynomialRing

i2 : I = ideal(a*d-b*c)

o2 = ideal(- b*c + a*d)

o2 : Ideal of R

i3 : S = R/I

o3 = S

o3 : QuotientRing

i4 : S' = toNCRing(S)
--Calling Bergman for NCGB calculation.
Complete!

o4 = S'

o4 : NCQuotientRing

i5 : ideal S'

o5 = Two-sided ideal {-ba+ab, -ca+ac, -cb+bc, -da+ad, -db+bd, -dc+cd, -bc+ad}

o5 : NCIdeal

i6 : 
