So, I have gotten a few questions about homework #4 throughout the day, but I haven’t had a chance to post anything about them due to a very crowded schedule. I will post a few comments now at least.

First, though: if you have questions about something, don’t think you’re alone just because the blog is empty. It’s of course better to try to come up with the questions sooner rather than later so I have a chance to answer and post comments, but it’s also true that at least part of the homework depended on Tuesday’s lecture. So, well. Anyway, on to the posts.