D.8.1.1 staircase
.................
Procedure from library graphics.lib (see graphics_lib).

Usage:
staircase(s,I); s a string, I ideal in two variables

Return:
string with Mathematica input for displaying staircase diagrams of an
ideal I, i.e. exponent vectors of the initial ideal of I

Note:
ideal I should be given by a standard basis. Let s="" and copy and
paste the result into a Mathematica notebook.

Example:
LIB "graphics.lib";
ring r0 = 0,(x,y),ls;
ideal I = -1x2y6-1x4y2, 7x6y5+1/2x7y4+6x4y6;
staircase("",std(I));
ring r1 = 0,(x,y),dp;
ideal I = fetch(r0,I);
staircase("",std(I));
ring r2 = 0,(x,y),wp(2,3);
ideal I = fetch(r0,I);
staircase("",std(I));
// Paste the output into a Mathematica notebook
// active evalutation of the cell with SHIFT RETURN

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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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