createDpairs -- pairs coordinate and derivation variables in a Weyl algebra

• Usage:

  createDpairs A

• Inputs:
  • A, the Weyl algebra
• Consequences:

  • attaches to A a pair of keys to help distinguish the coordinate variables from the derivation variables.

i1 : W = QQ[x,y,Dx,Dy, WeylAlgebra => {x=>Dx,y=>Dy}]

o1 = W

o1 : PolynomialRing, 2 differential variable(s)

i2 : createDpairs W

i3 : W.dpairVars

o3 = {{x, y}, {Dx, Dy}, {}}

o3 : List

i4 : W.dpairInds

o4 = {{0, 1}, {2, 3}, {}}

o4 : List