FormalSeries == FormalSeries -- equality of formal series

Synopsis

• Operator: ==

• Usage:

  s == t

• Inputs:
  • s, an instance of the type FormalSeries,
  • t, an instance of the type FormalSeries,
• Outputs:
  • an integer,

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 : t = series(x+y+1,2)

o3 = FormalSeries{x + y + 1, 2}

o3 : FormalSeries

i4 : s == s

o4 = true

i5 : s == t

o5 = false

i6 : r = truncate(t,1)

o6 = FormalSeries{x + y + 1, 1}

o6 : FormalSeries

i7 : t == r

o7 = false