What You See Isn't What You Get. Work in progress. I've included some material on pinhole photography, including some pictures. Presentations Presentations I have given on topics related to the Web. Some are for beginning users, others are for those who write Web pages.
All presentations are in the form of Web pages.
Non-academic Interests Running The design of crazed runners at the top of the page is a frieze pattern which has translations and glide reflections as symmetries. I drew it using the Unix version of Nina Amenta's Kali program. There is also a free Macintosh version by Jeff Weeks. You can get the software from The Geometry Center. Or you can try Kali out over the Web.