Singular

5.1.110 parstr

Syntax:

parstr ( ring_name )
parstr ( int_expression )
parstr ( ring_name, int_expression )

Type:

string

Purpose:

returns the list of parameters of the ring as a string or the name of the n-th parameter where n is given by the int_expression.
If the ring_name is omitted, the basering is used, thus parstr(n) is equivalent to parstr(basering,n).

Example:

ring r=(7,a,b,c),(x,y),wp(2,3); parstr(r); ==> a,b,c parstr(2); ==> b parstr(r,3); ==> c