Here is the <code>.tex</code> not quite "as-is," but modified minimally so that it will compile: [<code>DTnotes.tex</code>][1].
And here is <code>.pdf</code> produced by compiling that <code>.tex</code>: &nbsp;[<code>DTnotes.pdf</code>][2].


  [1]: http://cs.smith.edu/~jorourke/MathOverflow/DTnotes.tex
  [2]: http://cs.smith.edu/~jorourke/MathOverflow/DTnotes.pdf