Chapter 13

When I listed the curriculum I originally wrote:

All chapters from the textbook that have been covered by the lectures: Chapters 1-9, 14,15, 19-21.

But I forgot to list Chapter 13, which has indeed been covered by a lecture and is also the basis for one of the obligatory exercises! So this should be corrected to:

All chapters from the textbook that have been covered by the lectures: Chapters 1-9, 13-15, 19-21.