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D.2.11.26 addvarsTo

Procedure from library ring.lib (see ring_lib).

Usage:
addvarsTo(ring,list_of_strings, int);
int may be: 0:ordering: dp
1:ordering dp,dp
2:oring.ordering,dp

Return:
a ring with the addtional variables

Example:
 
LIB "ring.lib";
ring r=0,(x,y),lp;
def rr=addvarsTo(r,list("a","b"),0);
rr; kill rr;
==> // coefficients: QQ
==> // number of vars : 4
==> //        block   1 : ordering C
==> //        block   2 : ordering dp
==> //                  : names    x y a b
def rr=addvarsTo(r,list("a","b"),1);
rr; kill rr;
==> // coefficients: QQ
==> // number of vars : 4
==> //        block   1 : ordering C
==> //        block   2 : ordering dp
==> //                  : names    x y
==> //        block   3 : ordering dp
==> //                  : names    a b
def rr=addvarsTo(r,list("a","b"),2);
rr;
==> // coefficients: QQ
==> // number of vars : 4
==> //        block   1 : ordering lp
==> //                  : names    x y
==> //        block   2 : ordering C
==> //        block   3 : ordering dp
==> //                  : names    a b