Singular

5.1.158 varstr

Syntax:

varstr ( ring_name )
varstr ( int_expression )
varstr ( ring_name, int_expression )

Type:

string

Purpose:

returns the list of the names of the ring variables as a string or the name of the n-th ring variable, where n is given by the int_expression.
If the ring name is omitted, the basering is used, thus varstr(n) is equivalent to varstr(basering,n).

Example:

ring r=0,(x,y,z),dp; varstr(r); ==> x,y,z varstr(r,1); ==> x varstr(2); ==> y