• Announcements: Today's lecture was conducted in person, but, as an alternative, you will find below a recording of a lecture I gave last year covering the same topics, as well as the PDF file with the corresponding notes. Please remember that next week is Spring Break, so there are no classes nor homework assignments. Our next class is scheduled for Monday April 25, in person, as per our day-by-day schedule.

• Lecture 21: Download file or watch below