You have a proof test on Wednesday. Review the proofs by contradiction that we have covered (hint: Materials Archive tab), in preparation for the proof test. Focus on understanding the structure of a proof by contradiction and the negation necessary.

In class on Wednesday we will take up this worksheet on setting up proofs by contradiction (which is really about negating). Take a stab at it before class, as practice with the structure of proof by contradiction.

One week to our sets test, so please keep working on solidifying knowledge there. Read Hammack, Section 1.6 and do exercises as needed.