Difference between revisions of "Elliptic curves"
From JSXGraph Wiki
Jump to navigationJump to searchA WASSERMANN (talk | contribs) |
A WASSERMANN (talk | contribs) |
||
| Line 17: | Line 17: | ||
brd.createElement('text',[12,-4,'(b)']); | brd.createElement('text',[12,-4,'(b)']); | ||
| − | var c1 = brd.createElement('curve', ['x', function(x){ return Math.sqrt( | + | var c1 = brd.createElement('curve', ['x', function(x){ return Math.sqrt(x*x*x+a.Value()*x+b.Value()); }, 'x'], {strokeWidth:3,strokeColor:'black'}); |
| − | var c2 = brd.createElement('curve', ['x', function(x){ return -Math.sqrt( | + | var c2 = brd.createElement('curve', ['x', function(x){ return -Math.sqrt(x*x*x+a.Value()*x+b.Value()); }, 'x'], {strokeWidth:3,strokeColor:'black'}); |
brd.unsuspendUpdate(); | brd.unsuspendUpdate(); | ||
Revision as of 20:21, 30 January 2009
An elliptic curve can be written as a plane algebraic curve defined by an equation of the form
- [math] y^2=x^3+ax+b\,. [/math]
<link rel="stylesheet" type="text/css" href="http://jsxgraph.uni-bayreuth.de/distrib/jsxgraph.css" />
<script type="text/javascript" src="http://jsxgraph.uni-bayreuth.de/distrib/prototype.js"></script>
<script type="text/javascript" src="http://jsxgraph.uni-bayreuth.de/distrib/jsxgraphcore.js"></script>
<div id="jxgbox" class="jxgbox" style="width:600px; height:400px;"></div>
