char -- computes the characteristic of the ring or field

Synopsis

• Usage:

  char F

• Inputs:
  • F, a ring
• Outputs:
  • the characteristic of the ring.

Description

i1 : R = ZZ/10007[x,y];

i2 : char R

o2 = 10007

i3 : R = ZZ[x]/823671827384723894723894723892

o3 = R

o3 : QuotientRing

i4 : char R

o4 = 823671827384723894723894723892