- FormalSeries -- minus a formal series

Synopsis

• Operator: -

• Usage:

  -s

• Inputs:
  • s, an instance of the type FormalSeries,

Description

i1 : R=ZZ[x,y]

o1 = R

o1 : PolynomialRing

i2 : s = series(x^2+x+y,2)

                   2
o2 = FormalSeries{x  + x + y, 2}

o2 : FormalSeries

i3 : -s

                     2
o3 = FormalSeries{- x  - x - y, 2}

o3 : FormalSeries