Friday, March 23rd

For Friday:

  • Proof Quiz will be a proof that a function is/is not injective/surjective.  Read Hammack Section 12.2.  Examples 12.4 and 12.5 are ideal models, as are exercises 2-10 (where “verify” means “prove or disprove” (disprove means prove the negation).
  • Reminder that individual homework is due.  The assignment is under Resources (above) under Groupwork. (But you can do it individually.)  Hand in on canvas.
  • You can still earn badges in office hour Wed/Thur, as explained previously.
  • In class, we will continue talking about functions and cardinalities.