* There are errata to Q2, Q5, and Q8; see the assignment page or
the bonus point page.
* Some of the questions have many parts and require division into
many cases. However, you can often reduce your work by using
earlier results or earlier cases to prove later results and later
cases. Also sometimes you can use symmetry arguments to halve
the number of cases.
* You may find it helpful to first prove some auxiliary results
that you find yourself using over and over again. For instance
the following result might be helpful to prove: "|x| <= epsilon
if and only if -epsilon <= x <= epsilon".
Terry