Dirichlet's unit theorem

I have posted a very preliminary version about Dirichlet's theorem. For some reason I stared to write in Norwegian and did not realise it until I was more half way three. Sorry for this if some non norwegian speaking students still are interested. The proof is, of course, up to presentation, the same as in the book.

It is a very raw version, but I hope it will be useful for you though.

Geir