-- -*- M2-comint -*- {* hash: -2061804335 *} i1 : W = QQ[x,y,Dx,Dy, WeylAlgebra => {x=>Dx,y=>Dy}] o1 = W o1 : PolynomialRing i2 : I = ideal (x*Dx+2*y*Dy-3, Dx^2-Dy) 2 o2 = ideal (x*Dx + 2y*Dy - 3, Dx - Dy) o2 : Ideal of W i3 : charIdeal I 2 o3 = ideal (Dx , x*Dx + 2y*Dy) o3 : Ideal of QQ[x, y, Dx, Dy] i4 :