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_standard__Monomial__Poset.html
<!DOCTYPE html> <html lang="en"> <head> <title>standardMonomialPoset -- generates the poset of divisibility in the monomial basis of an ideal</title> <meta content="text/html; charset=utf-8" http-equiv="Content-Type"> <link type="text/css" rel="stylesheet" href="../../../../Macaulay2/Style/doc.css"> <link rel="stylesheet" href="../../../../Macaulay2/Style/katex/katex.min.css"> <script defer="defer" src="../../../../Macaulay2/Style/katex/katex.min.js"></script> <script defer="defer" src="../../../../Macaulay2/Style/katex/contrib/auto-render.min.js"></script> <script> var macros = { "\\break": "\\\\", "\\ZZ": "\\mathbb{Z}", "\\NN": "\\mathbb{N}", "\\QQ": "\\mathbb{Q}", "\\RR": "\\mathbb{R}", "\\CC": "\\mathbb{C}", "\\PP": "\\mathbb{P}" }, delimiters = [ { left: "$$", right: "$$", display: true}, { left: "\\[", right: "\\]", display: true}, { left: "$", right: "$", display: false}, { left: "\\(", right: "\\)", display: false} ], ignoredTags = [ "kbd", "var", "samp", "script", "noscript", "style", "textarea", "pre", "code", "option" ]; document.addEventListener("DOMContentLoaded", function() { renderMathInElement(document.body, { delimiters: delimiters, macros: macros, ignoredTags: ignoredTags, trust: true }); }); </script> <style>.katex { font-size: 1em; }</style> <script defer="defer" src="../../../../Macaulay2/Style/katex/contrib/copy-tex.min.js"></script> <script defer="defer" src="../../../../Macaulay2/Style/katex/contrib/render-a11y-string.min.js"></script> <script src="../../../../Macaulay2/Style/prism.js"></script> <script>var current_version = '1.25.06';</script> <script src="../../../../Macaulay2/Style/version-select.js"></script> <link type="image/x-icon" rel="icon" href="../../../../Macaulay2/Style/icon.gif"> </head> <body> <div id="buttons"> <div> <a href="https://macaulay2.com/">Macaulay2</a> <span id="version-select-container"></span> » <a title="Macaulay2 documentation" href="../../Macaulay2Doc/html/index.html">Documentation </a> <br><a href="../../Macaulay2Doc/html/_packages_spprovided_spwith_sp__Macaulay2.html">Packages</a> » <span><a title="a package for working with partially ordered sets" href="index.html">Posets</a> :: <a title="generates the poset of divisibility in the monomial basis of an ideal" href="_standard__Monomial__Poset.html">standardMonomialPoset</a></span> </div> <div class="right"> <form method="get" action="https://www.google.com/search"> <input placeholder="Search" type="text" name="q" value=""> <input type="hidden" name="q" value="site:macaulay2.com/doc"> </form> <a href="_subposet.html">next</a> | <a href="_set__Suppress__Labels.html">previous</a> | <a href="_subposet.html">forward</a> | <a href="_set__Suppress__Labels.html">backward</a> | up | <a href="master.html">index</a> | <a href="toc.html">toc</a> </div> </div> <hr> <div> <h1>standardMonomialPoset -- generates the poset of divisibility in the monomial basis of an ideal</h1> <ul> <li> <dl class="element"> <dt>Usage: </dt> <dd><code class="language-macaulay2">P = standardMonomialPoset I</code></dd> <dd><code class="language-macaulay2">P = standardMonomialPoset(I, minDeg, maxDeg)</code></dd> </dl> </li> <li>Inputs: <ul> <li><span><span class="tt">I</span>, <span>a <a title="the class of all monomial ideals handled by the engine" href="../../Macaulay2Doc/html/___Monomial__Ideal.html">monomial ideal</a></span>, </span></li> <li><span><span class="tt">minDeg</span>, <span>an <a title="the class of all integers" href="../../Macaulay2Doc/html/___Z__Z.html">integer</a></span>, the minimum degree of a monomial in the poset</span></li> <li><span><span class="tt">maxDeg</span>, <span>an <a title="the class of all integers" href="../../Macaulay2Doc/html/___Z__Z.html">integer</a></span>, the maximum degree of a monomial in the poset</span></li> </ul> </li> <li>Outputs: <ul> <li><span><span class="tt">P</span>, <span>an instance of the type <a title="a class for partially ordered sets (posets)" href="___Poset.html">Poset</a></span>, </span></li> </ul> </li> </ul> <div> <h2>Description</h2> <div> <p>The standard monomial poset of a <a title="the class of all monomial ideals handled by the engine" href="../../Macaulay2Doc/html/___Monomial__Ideal.html">MonomialIdeal</a> is the poset of monomials in the <a title="quotient or division" href="../../Macaulay2Doc/html/_quotient.html">quotient</a> with partial ordering given by divisibility.</p> </div> <table class="examples"> <tr> <td> <pre><code class="language-macaulay2">i1 : R = QQ[x,y,z];</code></pre> </td> </tr> <tr> <td> <pre><code class="language-macaulay2">i2 : standardMonomialPoset monomialIdeal(x^2, y^2, z^2, x*y*z) o2 = Relation Matrix: | 1 1 1 1 1 1 1 | | 0 1 1 1 0 0 0 | | 0 0 1 0 0 0 0 | | 0 0 0 1 0 0 0 | | 0 0 1 0 1 1 0 | | 0 0 0 0 0 1 0 | | 0 0 0 1 0 1 1 | o2 : Poset</code></pre> </td> </tr> </table> <div> <p>If the integers minDeg and maxDeg are specified, then only the monomials with degrees between minDeg and maxDeg are used. As the standard monomial poset is ranked, this is the same as taking all the ranks between minDeg and maxDeg.</p> </div> <table class="examples"> <tr> <td> <pre><code class="language-macaulay2">i3 : standardMonomialPoset(monomialIdeal(x^4, y^4, z^4, x*y*z), 3, 4) o3 = Relation Matrix: | 1 1 1 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 | | 0 1 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 | | 0 0 1 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 | | 0 1 0 1 1 0 0 0 0 0 0 0 0 0 0 0 0 0 | | 0 0 0 0 1 0 0 0 0 0 0 0 0 0 0 0 0 0 | | 0 0 1 0 0 1 1 0 0 0 0 0 0 0 0 0 0 0 | | 0 0 0 0 0 0 1 0 0 0 0 0 0 0 0 0 0 0 | | 0 0 0 0 1 0 0 1 1 0 0 0 0 0 0 0 0 0 | | 0 0 0 0 0 0 0 0 1 0 0 0 0 0 0 0 0 0 | | 0 0 0 0 0 0 1 0 0 1 1 0 0 0 0 0 0 0 | | 0 0 0 0 0 0 0 0 0 0 1 0 0 0 0 0 0 0 | | 0 0 0 0 0 0 0 0 1 0 0 1 1 0 0 0 0 0 | | 0 0 0 0 0 0 0 0 0 0 0 0 1 0 0 0 0 0 | | 0 0 0 0 0 0 0 0 0 0 0 0 1 1 1 0 0 0 | | 0 0 0 0 0 0 0 0 0 0 0 0 0 0 1 0 0 0 | | 0 0 0 0 0 0 0 0 0 0 0 0 0 0 1 1 1 0 | | 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 1 0 | | 0 0 0 0 0 0 0 0 0 0 1 0 0 0 0 0 1 1 | o3 : Poset</code></pre> </td> </tr> </table> </div> <div> <h2>See also</h2> <ul> <li><span><a title="basis or generating set of all or part of a ring, ideal or module" href="../../Macaulay2Doc/html/_basis.html">basis</a> -- basis or generating set of all or part of a ring, ideal or module</span></li> <li><span><a title="make a monomial ideal" href="../../Macaulay2Doc/html/_monomial__Ideal.html">monomialIdeal</a> -- make a monomial ideal</span></li> </ul> </div> <div> <div class="waystouse"> <h2>Ways to use <span class="tt">standardMonomialPoset</span>:</h2> <ul> <li><kbd>standardMonomialPoset(MonomialIdeal)</kbd></li> <li><kbd>standardMonomialPoset(MonomialIdeal,ZZ,ZZ)</kbd></li> </ul> </div> <div class="waystouse"> <h2>For the programmer</h2> <p>The object <a title="generates the poset of divisibility in the monomial basis of an ideal" href="_standard__Monomial__Poset.html">standardMonomialPoset</a> is <span>a <a title="a type of method function" href="../../Macaulay2Doc/html/___Method__Function.html">method function</a></span>.</p> </div> <hr> <div class="waystouse"> <p>The source of this document is in <span class="tt">Posets.m2:3901:0</span>.</p> </div> </div> </div> </body> </html>
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