My apologies for the mess-up of the algebra-and-number-theory problems. I was not aware until very late that the two documents were different. Apparently some of you never did get the word, despite two messages. (The e-mail from NEO was written at 8 p.m. but for some reason my copy, at least, was not delivered till 5 a.m.)
I have decided not to assign any problems from the "Infinity" chapter. You need the time to work on your term papers. I have got the message from several of you in the past few weeks that the time commitment and the more advanced mathematical nature of the "modern" problems have become a strain (not to mention the effects of misprints, misnumbered problems, etc.). Well, you are not alone. I don't see how I can grade the essays, grade the term papers, grade the algebra problems, assign numerical grades to the book reviews, and write the final chapter that I want to do on the history of linear algebra, and also handle one more assignment! I think the homework problems have served their main purposes, which were to keep you all reading on schedule and thinking along with the reading. Although there are clear differences within the class in proficiency, I'm quite favorably impressed with the efforts and good sense of all of you. Please relax!
None of that should deter you from asking questions about the material in the "Infinity" chapter, either by private e-mail or -- better -- on WebCT. Set theory and "foundations of mathematics" form a fascinating area, full of philosophical conundrums. We should enjoy having some chats about it. As Calvin said (to Hobbes), "It's not work unless somebody makes you do it."