There are no mandatory exercises. That does not mean it's a good idea to skip the exercises, however.
The exercise web page is password protected using a password that is available on the course's page in It's learning.
The page is protected by the same password as the exercises.
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2009-06-04: Today's exam with suggested solutions (in Norwegian) is available at the exam collection page. Let me know if you find any errors in the solution.
D. W. Jordan & P. Smith: Non-linear ordinary differential equations: An introduction to dynamical systems, Fourth Edition, Oxford University Press 2007, ISBN-13 978-0-19-920824-1.
Ch. 1, 2, 3, 8, 10, 11, 12.1–4, 13.1 and Appendix A. Except 1.6, 3.3, 3.5, uniform stability i 8.3–8.4, all details concerning topographical systems in Ch. 10 (i.e., most of 10.2–10.4), and 10.11. I don't understand Theorem 10.10 (p. 351 (362 in the third edition)), so skip that.
You will note that my notes overlap quite a bit with the book, in which case you may choose which text to read. (But note that the statement of the Poincaré–Bendixson theorem in the book is wrong.)