Here is a collection of my thoughts - which will almost certainly be mainly mathematical. The idea of separating these from posts is that these will be written straight into this page, journal-like, and I won't bother doing any LaTeX business in them. They are supposed to just be quick summaries of things that I have learnt, or want to learn, so that if you happen to know more about it than I do (which I hope you do!) you might be able to come and enlighten me!