These notes are currently (Spring 2000) being extensively revised, new
versions are gradually appearing at 18.157
These notes are from a variety of courses starting (as you might
guess) in 1990. Parts of this are in a parlous state, but if you are
interested here the are:
June 12, 1998. First version of a new Chapter 6, on Elliptic Boundary Problems. Very preliminary Chapter6.dvi Chapter6.ps
August 27, 1997 -- mainly cosmetic changes to the first 4 Chapters.
Whole thing as an `acrobat' file iml.pdf or as a postscript file iml90.ps or as a dvi file iml90.dvi (August 27, 1997)