D.5.8.18 tangentcone
....................
Procedure from library sing.lib (see sing_lib).

Usage:
tangentcone(id [,n]); id = ideal, n = int

Return:
the tangent cone of id

Note:
the procedure works for any monomial ordering.

If n=0 use std w.r.t. local ordering ds, if n=1 use locstd

Example:
LIB "sing.lib";
ring R = 0,(x,y,z),ds;
ideal i  = 7xyz+z5,x2+y3+z7,5z5+y5;
tangentcone(i);
==> _[1]=x2
==> _[2]=7xyz
==> _[3]=y5+5z5
==> _[4]=7y4z
==> _[5]=35z6
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&nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; User manual for <a href="http://www.singular.uni-kl.de/"><i>Singular</i></a> version 2-0-4, October 2002,
generated by <a href="http://www.gnu.org/software/texinfo/"><i>texi2html</i></a>.
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