exercises for the September weeks; Oblig dates; updated curriculum list

We plod along, with more exercises from Ch 2, from the list 1, 2, 6, 7, 8, 12, 14, 17, 21, 29, 31, 34, 35, 45, 47, 48, 49, 50, 60; gently asterisked: 6, 11, 12, 14, 21, 29, 31, 35, 49, 50. Then from Ch 3, see the updated curriculum list: 1, 2, 3, 4, 5, 6, 7, 8, 9, 11, 12, 15, 16, 17, 20, 25, 26, 27, 29, 32, 33, 37; gently asterisked: 11, 16, 25, 32, 33. 

OBLIG dates: t_0 = Mon Oct 12 to t_1 = Mon Oct 26. 

There will be three (or four?) 20-minute presentations by our PhDs, inside the usual lecture hours; time slots & more to be decided on later.