<?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>inverse(Matrix) -- compute the inverse</title> <link rel="stylesheet" type="text/css" href="../../../../Macaulay2/Style/doc.css"/> </head> <body> <table class="buttons"> <tr> <td><div><a href="___Inverse__Method.html">next</a> | <a href="_inverse_spsystems.html">previous</a> | <a href="___Inverse__Method.html">forward</a> | <a href="_inverse_spsystems.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>inverse(Matrix) -- compute the inverse</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>inverse f</tt></div> </dd></dl> </div> </li> <li><span>Function: <a href="_inverse.html" title="compute the inverse">inverse</a></span></li> <li><div class="single">Inputs:<ul><li><span><tt>f</tt>, <span>a <a href="___Matrix.html">matrix</a></span></span></li> </ul> </div> </li> <li><div class="single">Outputs:<ul><li><span>the inverse of <tt>f</tt></span></li> </ul> </div> </li> </ul> </div> <div><!--empty documentation body--></div> <div class="waystouse"><div class="single"><h2>Code</h2> <pre>../../m2/methods.m2:506:52-515:26: --source code: cacheValue = key -> f -> new CacheFunction from (x -> ( c := try x.cache else x.cache = new CacheTable; if c#?key then ( val := c#key; if class val === CacheFunction then ( remove(c,key); c#key = val x) else val ) else c#key = f x)) | symbol class value location of symbol | ------ ----- ----- ------------------ | f : FunctionClosure -- {*Function[../../m2/matrix1.m2:629:7-632:10]*} ../../m2/methods.m2:506:21-506:21 | key : Symbol -- inverse ../../m2/methods.m2:506:14-506:16 | -- function f: | ../../m2/matrix1.m2:629:8-632:11: --source code: | m -> ( | (quo,rem) := quotientRemainder(id_(target m), m); | if rem != 0 then error "matrix not invertible"; | quo))</pre> </div> </div> </div> </body> </html>