content -- the content of a polynomial

• Usage:

  content f

  content(f, x)

• Inputs:
  • f, a ring element,
  • x, a ring element, a variable in the ring of f
• Outputs:
  • an ideal, the content of a matrix or polynomial

i1 : R = ZZ[x,y]

o1 = R

o1 : PolynomialRing

i2 : content(4*x + 6*x^5)

o2 = ideal (6, 4)

o2 : Ideal of ZZ

i3 : content(4*x + 6*x^5, x)

o3 = ideal (6, 4)

o3 : Ideal of R

i4 : content(4*x + 6*x^5, y)

             5
o4 = ideal(6x  + 4x)

o4 : Ideal of R

i5 : generator oo

       5
o5 = 6x  + 4x

o5 : R

../../../../Macaulay2/m2/matrix1.m2:674:33-674:66: --source code:
content(RingElement) := Ideal => (f) -> ideal \\ last \ listForm f
../../../../Macaulay2/m2/matrix1.m2:675:46-675:99: --source code:
content(RingElement, RingElement) := Ideal => (f,x) -> ideal last coefficients(f, Variables => {x})