Lecture 6

We covered sections 4.10-4.14. Specifically

• variant ways to think about congruence mod k
• a sample proof using the definition of congruence mod k
• variant ways to think about arithmetic mod k
• some examples of arithmetic in A_k

Sections 5.1-5.4 were also on the readings for today. Those are mostly basic definitions, assigned for today so that you didn't have a mountain of stuff to read for next Tuesday.

Announcements

• As an experiment, we've posted the problems for discussion section on piazza. Have a look at them before discussion, if you have a chance. We're hoping this will make it easier to participate and ask questions in discussion.
• Homework and quizzes due next week will be posted soon.
• The first honors homework should be posted soon. Watch Piazza for announcements.
• A representative from the Linkete Society did a short ad for their very new RSO. They're offering (free!) tutoring and study group services for students. I'll post a pointer to their web site when they get it up.