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GAP 4.8.9 installation with standard packages -- copy to your CoCalc project to get it
Project: cocalc-sagemath-dev-slelievre
Views: 418386<!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN"> <html> <head> <meta http-equiv="content-type" content="text/html; charset=ISO-8859-1"> <title>AboutHap</title> </head> <body style="color: rgb(0, 0, 153); background-color: rgb(204, 255, 255);" alink="#000066" link="#000066" vlink="#000066"> <br> <table style="text-align: left; margin-left: auto; margin-right: auto; color: rgb(0, 0, 102);" border="0" cellpadding="20" cellspacing="10"> <tbody> <tr align="center"> <th style="vertical-align: top;"> <table style="width: 100%; text-align: left;" cellpadding="2" cellspacing="2"> <tbody> <tr> <td style="vertical-align: top;"><a href="aboutTopology.html"><small style="color: rgb(0, 0, 102);">Previous</small></a><br> </td> <td style="text-align: center; vertical-align: top; color: rgb(0, 0, 102);"><big><span style="font-weight: bold;">About HAP: Crossed module and third cohomology<br> </span></big></td> <td style="text-align: right; vertical-align: top;"><a href="aboutExtensions.html"><small style="color: rgb(0, 0, 102);">next</small></a><br> </td> </tr> </tbody> </table> <big><span style="font-weight: bold;"></span></big><br> </th> </tr> <tr> <td style="vertical-align: top; background-color: rgb(255, 255, 255); text-align: left;"> <div style="text-align: center;"></div> <div style="text-align: center;"> <h3>Some classical theory</h3> </div> <p>The <a href="aboutTwistedCoefficients.html">cohomology</a> H<sup>n</sup>(G,A) of G with coefficients in a G-module A, together with the corresponding <a href="aboutCocycles.html">cocycles</a>, have a useful group-theoretic interpretation for n=2. <br> </p> <br> </td> </tr> <tr align="center"> <td style="vertical-align: top; background-color: rgb(255, 255, 255);"> <h3>An example</h3> <br> </td> </tr> <tr> <td style="vertical-align: top; background-color: rgb(255, 255, 204);"><br> </td> </tr> <tr> <td style="vertical-align: top; background-color: rgb(255, 255, 255);"><br> </td> </tr> <tr> <td style="vertical-align: top;"> <table style="margin-left: auto; margin-right: auto; width: 100%; text-align: left;" border="0" cellpadding="2" cellspacing="2"> <tbody> <tr> <td style="vertical-align: top;"><a style="color: rgb(0, 0, 102);" href="aboutTopology.html">Previous Page</a><br> </td> <td style="text-align: center; vertical-align: top;"><a href="aboutContents.html"><span style="color: rgb(0, 0, 102);">Contents</span></a><br> </td> <td style="text-align: right; vertical-align: top;"><a href="aboutExtensions.html"><span style="color: rgb(0, 0, 102);">Next page</span><br> </a> </td> </tr> </tbody> </table> <a href="aboutTopology.html"><br> </a> </td> </tr> </tbody> </table> <br> <br> </body> </html>