D.5.8.5 is_is
.............
Procedure from library sing.lib (see sing_lib).

Usage:
is_is(id); id ideal or poly

Return:
intvec = sequence of dimensions of singular loci of ideals
generated by id[1]..id[i], k = 1..size(id); 

dim(0-ideal) = -1;

id defines an isolated singularity if last number is 0

Note:
printlevel >=0: display comments (default)

Example:
LIB "sing.lib";
int p      = printlevel;
printlevel = 1;
ring r     = 32003,(x,y,z),ds;
ideal i    = x2y,x4+y5+z6,yx2+xz2+zy7;
is_is(i);
==> // dim of singular locus = 0
==> // isolated singularity if last number is 0 in dim-sequence:
==> 2,1,0
poly f     = xy+yz;
is_is(f);
==> // dim of singular locus = 1
==> // isolated singularity if last number is 0 in dim-sequence:
==> 1
printlevel = p;

<font size="-1">
&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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