5.1.4 char

Syntax:

char ( ring_name )

Type:

int

Purpose:

returns the characteristic of the coefficient field of a ring.

Example:

ring r=32003,(x,y),dp; char(r); → 32003 ring s=0,(x,y),dp; char(s); → 0 ring ra=(7,a),(x,y),dp; minpoly=a^3+a+1; char(ra); → 7 ring rp=(49,a),(x,y),dp; char(rp); → 7 ring rr=real,x,dp; char(rr); → 0

See charstr; ring.