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NoetherianOperators :: - DiffOp

- DiffOp -- negation of differential operators

Synopsis

Description

Corresponds to $(-1)*D$

i1 : R = QQ[x,y];
i2 : D = diffOp{x => x^2+ y}

       2
o2 = (x  + y)dx

o2 : DiffOp
i3 : - D

         2
o3 = (- x  - y)dx

o3 : DiffOp