Solutions to today's homework are now posted.

A couple of points with regard to the test:

1. Note that for HW 1 only a couple of tree solutions are provided. However there are two other problem sets labeled More1 and More2. These were not formally assigned to you, but full solutions are presented, so they may occur on the tests.

2. Note that the solutions to HW 3&4 provide you with a link to video & slides on which several of the proofs are presented. Do not neglect to study these. A few of them are a little tricky, but these are fair game for the test as well.