Changes to seminar leaders, and couple of hand-in messages

• The latter first: I posted in Canvas a generic reply to a frequently asked question, and some question-specific hints.
• A warning also: last time around publication of results, the Canvas iOS app was buggy. Now the Android app is buggy. When results are ready, use browser.
• Then as to how to make the seminar leader cabal go around, given that we have spent . I (Nils) generally think it is a bad idea to have the same person explain things in seminars as on lectures, so I will try to do away with most of my seminar teaching when it is integrals. Then Tuomas will take a seminar week on differential equations. And we swapped around with Seongbong, so that the same person will give all three seminars except the final one.
  Likely that person will be Nils, Nils, Tuomas for the next seminars, and then Seongbong will give all three seminars #9 and 10. Details are shaping up, but expect changes. 
• Finally: 
  Several of you have requested to move a seminar til you are back from Rome. Although we don't move three seminars, we can take my office hours after the lecture Thursday in a week. I'll discuss with you in class tomorrow.

- Nils