Lecture 1 (1/06)
Lecture 2 (1/08)
Lecture 3 (1/13)
Lecture 4 (1/15)
Lecture 5 (1/20)
Lecture 6 (1/22)
Lecture 7 (2/03)
Lecture 8 (2/05)
Lecture 9 (2/10)
Lecture 10 (2/12)
Lecture 11 (2/17)
Lecture 12 (2/19)
Lecture 13 (3/02)
Lecture 14 (3/04)
Lecture 15 (3/16)
Lecture 16 (3/18)
Lecture 17 (3/23; modified 3/25)
Lecture 18 (4/06)
Lecture 19 (4/08)
Lecture 20 (4/13)
Lecture 21 (4/15)