coeff = leadTerm f
Returns the lead term of an NCRingElement (as an NCRingElement).
i1 : A = QQ{x,y,z,w} o1 = A o1 : NCPolynomialRing
i2 : f = x^2+y^2+2*z^3 3 2 2 o2 = 2z +y +x o2 : A
i3 : coeff = leadTerm f 3 o3 = 2z o3 : A