5.1.7 charstr

Syntax:

charstr ( ring_name )

Type:

string

Purpose:

returns the description of the coefficient field of a ring. (Tests for certain types of coefficients should use the routines from ring.lib as the string representation may change.)

Example:

ring r=32003,(x,y),dp; charstr(r); ==> ZZ/32003 ring s=0,(x,y),dp; charstr(s); ==> QQ ring ra=(7,a),(x,y),dp; minpoly=a^3+a+1; charstr(ra); ==> 7,a ring rp=(49,a),(x,y),dp; charstr(rp); ==> 49,a ring rr=real,x,dp; charstr(rr); ==> Float()