-- -*- M2-comint -*- {* hash: -1335781736 *}

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 : holonomicRank I

o3 = 2

i4 :