5.1.164 variables

Syntax:

variables ( poly_expression )
variables ( ideal_expression )
variables ( matrix_expression )

Type:

ideal

Purpose:

variables(p) returns the list of all ring variables the argument depends on.

Example:

ring r=0,(x,y,z),dp; variables(2); ==> _[1]=0 variables(x+y2); ==> _[1]=x ==> _[2]=y variables(ideal(x+y2,x3y,z)); ==> _[1]=x ==> _[2]=y ==> _[3]=z string(variables(ideal(x+y2,x3y,z))); ==> x,y,z