I have started to lecture ¡­

I have started to lecture Chapther 3. Exercises to be solved in the weeks to come : 3.2.1 (page 101): ex. 1, ex. 2, ex. 3, ex. 4, ex. 5, ex. 9. 3.3.1 (page 109): ex. 1,ex. 5, ex. 6, ex. 8 a,b,d, ex. 9, ex. 10, ex. 11.