To my hardworking students diligently attacking the first problem set:

One of my TAs just noticed a typo on the Problem set.  Problem 4(d)
should have been "001," not "1" as shown.  The correction has been made
on the web page.  I very much apologize to those of you who wasted
time struggling with Problem 4(d) as it was.  Yes, there is an answer
to the problem as originally stated, but that involves far more
subtlety than I think is reasonable at this early point in the semester.

Later, when we have some time, I will go through that subtlety, but for
now, please solve the problem with the value 001.

Thank you.
Yale Patt