Here are the lecture notes. 
<P>
They will be updated during the course.
Comments welcome.
<P>
<H2> Notes from 2003/4</H2>
Last updated: April 1 2004, 02:00

<UL>
<LI>
<A HREF="All.ps">Lectures 1-9 </A> ps-file
<BR>
<A HREF="All.pdf">Lectures 1-9 </A> pdf-file
</UL>

<H2> Notes from 2006/7</H2>
<UL>
<LI>
<A HREF="slides06.html">Slides</A>
<BR>
Not yet posted
<LI>
<A HREF="notes06.html">Lecture notes</A>
<BR>
Not yet posted
</UL>