First set of exercise problems

The first set of exercise problems has now been added to the "Weekly exercises"-page. Solutions to the exercises will be presented on the exercise class next week. I strongly recommend that you take a look at problems beforehand and try to solve at least a few of them before class.

Also, I have updated the second set of lecture slides after correcting a few (hopefully most:) of the typos. Please let me know if you find any additional things that look weird/incorrect.