<?xml version="1.0" encoding="utf-8" ?> <!-- for emacs: -*- coding: utf-8 -*- --> <!-- Apache may like this line in the file .htaccess: AddCharset utf-8 .html --> <!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.1 plus MathML 2.0 plus SVG 1.1//EN" "http://www.w3.org/2002/04/xhtml-math-svg/xhtml-math-svg-flat.dtd" > <html xmlns="http://www.w3.org/1999/xhtml" xml:lang="en"> <head><title>generators(GroebnerBasis) -- the generator matrix of a Gröbner basis</title> <link rel="stylesheet" type="text/css" href="../../../../Macaulay2/Style/doc.css"/> </head> <body> <table class="buttons"> <tr> <td><div><a href="_generators_lp__Ideal_rp.html">next</a> | <a href="_generators_lp__General__Ordered__Monoid_rp.html">previous</a> | <a href="_generators_lp__Ideal_rp.html">forward</a> | <a href="_generators_lp__General__Ordered__Monoid_rp.html">backward</a> | up | <a href="index.html">top</a> | <a href="master.html">index</a> | <a href="toc.html">toc</a> | <a href="http://www.math.uiuc.edu/Macaulay2/">Macaulay2 web site</a></div> </td> </tr> </table> <hr/> <div><h1>generators(GroebnerBasis) -- the generator matrix of a Gröbner basis</h1> <div class="single"><h2>Synopsis</h2> <ul><li><div class="list"><dl class="element"><dt class="heading">Usage: </dt><dd class="value"><div><tt>generators g</tt><br/><tt>gens g</tt></div> </dd></dl> </div> </li> <li><span>Function: <a href="_generators.html" title="provide matrix or list of generators">generators</a></span></li> <li><div class="single">Inputs:<ul><li><span><tt>g</tt>, <span>a <a href="___Groebner__Basis.html">Groebner basis</a></span></span></li> </ul> </div> </li> <li><div class="single">Outputs:<ul><li><span><span>a <a href="___Matrix.html">matrix</a></span>, whose columns are the generators of the Gröbner basis <tt>g</tt></span></li> </ul> </div> </li> <li><div class="single"><a href="_using_spfunctions_spwith_spoptional_spinputs.html">Optional inputs</a>:<ul><li><span><tt>CoefficientRing => </tt><span><span>default value null</span>, unused option</span></span></li> </ul> </div> </li> </ul> </div> <div class="single"><h2>Description</h2> <div>The following ideal defines a set of 18 points over the complex numbers. We compute a lexicographic Gröbner basis of the ideal.<table class="examples"><tr><td><pre>i1 : R = QQ[a..d, MonomialOrder=>Lex];</pre> </td></tr> <tr><td><pre>i2 : I = ideal(a^7-b-3, a*b-1, a*c^2-3, b*d-4); o2 : Ideal of R</pre> </td></tr> <tr><td><pre>i3 : gens gb I o3 = | d8-49152d-65536 16384c2-3d7+147456 16384b-d7+49152 4a-d | 1 4 o3 : Matrix R <--- R</pre> </td></tr> </table> </div> </div> <div class="single"><h2>See also</h2> <ul><li><span><a href="___Gröbner_spbases.html" title="">Gröbner bases</a></span></li> </ul> </div> </div> </body> </html>