Let $1 = lec9.
The lecture notes for the lecture of tonight are in files:

http://www.ccs.neu.edu/research/demeter/course/f97/lectures/powerpoint

$1.ppt.zip
$1.ppt

http://www.ccs.neu.edu/research/demeter/course/f97/lectures/postscript

$1-color-2-per-page.ps.zip
$1-color-2-per-page.ps

All earlier lecture notes are also in those two directories.

-- Karl L.