D.4.2.7 select1
...............
Procedure from library elim.lib (see elim_lib).

Usage:
select1(id,n[,m]); id ideal/module, n, m integers

Return:
generators of id containing the variable n

[at least one of the variables up to m]

Note:
use 'select' for selecting generators containing all the
variables between n and m

Example:
LIB "elim.lib";
ring r=0,(x,y,t,s,z),(c,dp);
ideal i=x-y,y-z2,z-t3,s-x+y3;
ideal j=select1(i,1);
j;
==> j[1]=x-y
==> j[2]=y3-x+s
module m=i*(gen(1)+gen(2));
m;
==> m[1]=[x-y,x-y]
==> m[2]=[-z2+y,-z2+y]
==> m[3]=[-t3+z,-t3+z]
==> m[4]=[y3-x+s,y3-x+s]
select1(m,1,2);
==> _[1]=[x-y,x-y]
==> _[2]=[-z2+y,-z2+y]
==> _[3]=[y3-x+s,y3-x+s]
See also:
nselect;
select.

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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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