Welcome to the month of March!   For Friday:

• Group presentation day — be prepared.
• Your quiz will be a constructive existence proof, and will involve rational/irrational numbers.  Study appropriately (see your groupwork, and read Hammack 7.3-7.4).  Here are a couple similar types of proofs appropriate to study by:
  • For every irrational x, there exists an irrational y such that xy = 1.
  • For every two rational numbers x and y, there is an irrational between x and y (we did this one before).
  • Every rational number can be written as a product of two rational numbers.