Homework 4. Assigned: Tue Feb 20. Due: Fri Mar 2 at 4 p.m.
This homework is much more substantial than the others assigned
so far. Do not leave it to the last minute or you will not
have time to do it. The grade on this homework will count
more than the others so far, and understanding the concepts
will be important for the midterm exam.
Reading: Chapter 5 of Ascher-Greif.