truncate(FormalSeries,ZZ) -- truncate formal series

• Function: truncate

• Usage:

  truncate(s,n)

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

i1 : R=ZZ[x,y]

o1 = R

o1 : PolynomialRing

i2 : s = series(x^7+x^2+x+y,7)

                   7    2
o2 = FormalSeries{x  + x  + x + y, 7}

o2 : FormalSeries

i3 : truncate(s,4)

                   2
o3 = FormalSeries{x  + x + y, 4}

o3 : FormalSeries