Math Forum
http://mathforum.org/kb
List of forum topicsenboundary tracing
http://mathforum.org/kb/thread.jspa?messageID=8100593&tstart=0#8100593
I am trying to trace boundary of which some examples are shown

Jan 18, 2013 4:10:09 AMJan 18, 2013 4:10:09 AMpani1mys@rediffmail.com0