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FormalGroupLaws :: - FormalSeries

- FormalSeries -- minus a formal series

Synopsis

Description

This returns the additive opposite of the formal series s.

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