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<!DOCTYPE html> <html lang="en"> <head> <title>incOrbit -- the increasing map orbit of an element</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 computing equivariant Gröbner bases" href="index.html">EquivariantGB</a> :: <a title="the increasing map orbit of an element" href="_inc__Orbit.html">incOrbit</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="___Out__File.html">next</a> | <a href="_exponent__Matrix.html">previous</a> | <a href="___Out__File.html">forward</a> | <a href="_exponent__Matrix.html">backward</a> | up | <a href="master.html">index</a> | <a href="toc.html">toc</a> </div> </div> <hr> <div> <h1>incOrbit -- the increasing map orbit of an element</h1> <ul> <li> <dl class="element"> <dt>Usage: </dt> <dd><code class="language-macaulay2">O = incOrbit(f,n)</code></dd> <dd><code class="language-macaulay2">O = incOrbit(F,n)</code></dd> </dl> </li> <li>Inputs: <ul> <li><span><span class="tt">f</span>, <span>a <a title="the class of all ring elements handled by the engine" href="../../Macaulay2Doc/html/___Ring__Element.html">ring element</a></span>, an element of a ring created by <a title="creates a ring to be used with other functions in the EquivariantGB package" href="_build__E__Ring.html">buildERing</a></span></li> <li><span><span class="tt">F</span>, <span>a <a title="the class of all lists -- {...}" href="../../Macaulay2Doc/html/___List.html">list</a></span>, a list of ring elements</span></li> <li><span><span class="tt">n</span>, <span>an <a title="the class of all integers" href="../../Macaulay2Doc/html/___Z__Z.html">integer</a></span>, the index bound</span></li> </ul> </li> <li><a href="../../Macaulay2Doc/html/_using_spfunctions_spwith_spoptional_spinputs.html">Optional inputs</a>: <ul> <li><span><span class="tt">Symmetrize</span><span class="tt"> => </span><span class="tt">...</span>, <span>default value false</span></span></li> </ul> </li> <li>Outputs: <ul> <li><span><span class="tt">O</span>, <span>a <a title="the class of all lists -- {...}" href="../../Macaulay2Doc/html/___List.html">list</a></span>, a list of all elements in the orbit of <span class="tt">f</span> or <span class="tt">F</span></span></li> </ul> </li> </ul> <div> <h2>Description</h2> <div> <p>If <span class="tt">F</span> is an equivariant Gröbner basis for invariant ideal <span class="tt">I</span> with respect to a width order then this method produces a traditional Gröbner basis for the <span class="tt">n</span>th truncation of <span class="tt">I</span>.</p> <p>If the optional argument <span class="tt">Symmetrize</span> is set to true, then the full S_n orbit is produced.</p> </div> <table class="examples"> <tr> <td> <pre><code class="language-macaulay2">i1 : R = buildERing({symbol x}, {1}, QQ, 2);</code></pre> </td> </tr> <tr> <td> <pre><code class="language-macaulay2">i2 : O = incOrbit(x_0^2, 4) 2 2 2 2 o2 = {x , x , x , x } 0 1 2 3 o2 : List</code></pre> </td> </tr> <tr> <td> <pre><code class="language-macaulay2">i3 : P = incOrbit(x_0 + x_1^2, 3, Symmetrize=>true) 2 2 2 2 2 2 o3 = {x + x , x + x , x + x , x + x , x + x , x + x } 1 0 1 0 2 0 2 0 2 1 2 1 o3 : List</code></pre> </td> </tr> </table> </div> <div> <h2>Caveat</h2> <div> <p>The output is not necessarily in the same ring as the input. The width bound of the ring of the output will always be <span class="tt">n</span>.</p> </div> </div> <div> <div class="waystouse"> <h2>Ways to use <span class="tt">incOrbit</span>:</h2> <ul> <li><kbd>incOrbit(List,ZZ)</kbd></li> <li><kbd>incOrbit(RingElement,ZZ)</kbd></li> </ul> </div> <div class="waystouse"> <h2>For the programmer</h2> <p>The object <a title="the increasing map orbit of an element" href="_inc__Orbit.html">incOrbit</a> is <span>a <a title="a type of method function" href="../../Macaulay2Doc/html/___Method__Function__With__Options.html">method function with options</a></span>.</p> </div> <hr> <div class="waystouse"> <p>The source of this document is in <span class="tt">EquivariantGB.m2:1383:0</span>.</p> </div> </div> </div> </body> </html>
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