D.3.1.26 rm_unitcol
...................
Procedure from library matrix.lib (see matrix_lib).

Usage:
rm_unitcol(A); A matrix (being row-reduced)

Return:
matrix, obtained from A by deleting unit columns (having just one 1
and else 0 as entries) and associated rows

Example:
LIB "matrix.lib";
ring r=0,(A,B,C),dp;
matrix m[6][8]=
0,  0,    A,   0, 1,0,  0,0,
0,  0,  -C2,   0, 0,0,  1,0,
0,  0,    0,1/2B, 0,0,  0,1,
0,  0,    B,  -A, 0,2A, 0,0,
2C,-4C,  -A,   B, 0,B,  0,0,
0,  A,    0,   0, 0,0,  0,0;
print(rm_unitcol(m));
==> 0, 0,  B, -A,2A,
==> 2C,-4C,-A,B, B, 
==> 0, A,  0, 0, 0  

<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>.
</font>

</body>
</html>
