As you probably know (some people are just starting and don't) there's no limit on the number of times one can renew. Oops -- I was going to say that if anyone wanted to know what alephs, bets, etc. looked like, they could look on the 'Net -- then I realized that the majority of people reading here ar blind, so it doesn't matter. I think the book you're doing will be very useful to some of the students. When you have some time, can you explain what cantor's hypothesis is? In simple terms? or is that not possible. It sounds like something Reuven in Chaim Potok's The Chosen would have studied. Cindy -- __________________________________ Do you Yahoo!? Read only the mail you want - Yahoo! Mail SpamGuard. http://promotions.yahoo.com/new_mail