The lecture notes for the lecture of tonight are in:

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

lec7.ppt.zip
lec7.ppt

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

lec7-color-2-per-page.ps.zip
lec7-color-2-per-page.ps

All earlier lecture notes are also in those two directories.

-- Karl L.