**Problem Set 1**: Due Tuesday, __ February
13__ (not February 15), 2001 in class.

Solutions to PS1 are here.

Problem Set 2: Due Tuesday, March 6th, 2001 in class.

Problem Set 3: Due Tuesday, March 27th, 2001 in class.

Problem Set 4: Due Tuesday, April 10th, 2001 in class. **[Updated
4/9]**