
This directory contains a java program which
illustrates the Poncelet Porism and an
auxiliary result discovered by myself and
Sergei Tabachnikov.

To compile:

javac *.java

To run:

Java Main

The program is not very well documented bt
I hope that you can figure it out.   

The program works best with a 3 button mouse.
If you drag the middle button over the 
picture window, you can re-center the inner
ellipse.  This is crucial for getting
nontrivial instances of our theorem.

There is an Export feature which lets you 
save files to postscript. After you push
the button, you go into the directory
Output and type wish graph.tcl
In case you have tcl/tk installed
this will bring up an auxiliary
program. When you push the export
button on this program, you get a file
called temp.ps.   This painful procedure
is what we used to illustrate the paper.