
uses the Maxima command <tt>solve</tt> to obtain solutions to
<tt>f</tt><sub><tt>x</tt></sub><tt> = </tt><tt>f</tt><sub><tt>y</tt></sub><tt> = </tt><tt>0</tt>.  The program is written outside of Maxima
with a text editor, and then loaded into Maxima with the <tt>batch</tt>
command.  Here is the program listing:

<pre>
/*&nbsp;--------------------------------------------------------------------------&nbsp;
&nbsp;&nbsp;&nbsp;this&nbsp;is&nbsp;file&nbsp;critpts.max:&nbsp;
&nbsp;&nbsp;&nbsp;as&nbsp;you&nbsp;ca