Lecture time update until Easter

Today's (March 23) lecture discussion is cancelled to allow following Anders' talk. This means that I will put out the next lecture set after the discussion session on Friday, to be discussed on March 30. The next lecture discussion after that will then be only after Easter, on April 9.

The next problem set will be put out tomorrow, as usual, but only discussed on April 7 -- i.e. two weeks later.