Revised Version of Solution Sheet 4 Posted

I have posted a revised version of solution sheet 4 in which I have fixed some typos (where I note that a couple of typos were from the problem statement, so I also uploaded a corrected version of homework sheet 4) and added some additional explanation of a couple of points based on questions that arose in the classes on Friday.

Clarifications of some Questions in Homework 1

I have posted a revised document for homework 1 in which some questions are phrased somewhat more clearly and precisely. In case you felt that something was too ambiguous, you should look again.