5.1.5 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