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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()
See char; ordstr; ring; ring_lib; varstr.