The difference of the formal series is returned.
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 - t 2 o4 = FormalSeries{x - 1, 2} o4 : FormalSeries |