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extractDiffsAlgebra -- underlying polynomial ring in the differentials of a Weyl algebra

Usage:

extractDiffsAlgebra D
Inputs:
- D, a polynomial ring, a Weyl algebra
Outputs:
- a polynomial ring,

Description

Extracts from a Weyl algebra the polynomial ring in its differentials only.

i1 : D = makeWA(QQ[x,y])

o1 = D

o1 : PolynomialRing, 2 differential variable(s)

i2 : S = extractDiffsAlgebra D

o2 = S

o2 : PolynomialRing

i3 : describe S

o3 = QQ[dx, dy, Degrees => {2:1}, Heft => {1}]

See also

extractVarsAlgebra -- underlying polynomial ring in the ordinary variables of a Weyl algebra

Ways to use extractDiffsAlgebra:

extractDiffsAlgebra(PolynomialRing)

For the programmer

The object extractDiffsAlgebra is a method function.

The source of this document is in WeylAlgebras/DOC/general.m2:138:0.