The material for the seminar is divided into ten lectures (or more if required), which are supposed to be given mainly by the participants. The contents of each lecture is designed to fit into a two hour time slot. It is considered part of the preparation to decide which parts of the material should be omitted or emphasized. A thorough consult with one of the organizers before giving the lecture is vital to the success of the seminar. In the following brief descriptions of the ten lectures, all page and chapter references without further specification refer to [4].