Missing document request

Here is the .tex not quite "as-is," but modified minimally so that it will compile: DTnotes.tex. And here is .pdf produced by compiling that .tex:  DTnotes.pdf.

Joseph O'Rourke did what I should have thought to do myself: he wrote to David Dobkin, who still had a copy of a version of these notes in his email. I haven't yet gone over them to make them compile with a current tex environment, but here is a copy as-is. When I have a chance to fix it, I'll substitute a better version and I'll consider whether to put it in a more visible spot.