I'm Jonathan Pearson, and I am currently a post-doc researcher at Durham University in the Mathematical Sciences department. I recently finished a PhD at JBCA, University of Manchester in theoretical cosmology.
This site is a store for my physics & maths stuff: lecture notes, extra derivations, papers, talks, web-links.... There is all sorts of random stuff on here.
If you use my physics notes you should understand that I cannot be held responsible for errors, some documents may be riddled with typos.
Please have a look around the site (please let me know if something dosen't work properly).
During exam months, this site has 30,000 hits from all over the world. So whoever you are in Lithuania, Columbia, Chile, Malaysia, Ethiopia, Belgium (to name a few)... Bit mental really.