BIOLOGY 1A03 Lecture Notes - Lecture 2: Campus Radio, Empty Set

• School: McMaster University
• Department: Biology
• Course: BIOLOGY 1A03
• Professor: Alastair Tracey

Document Summary

Warmup: anna, bernie, charlie, david and emily are employees of campus radio. The station runs 2 shifts, morning (m) and afternoon (a). In words describe a n m. determine (m u a)c. A n m = is the set of employees who work both shifts (in this case it would be emily) M u a = {a,b,d,e} (m u a)c = {c} One of the other things we do with sets is to compare them. 2 sets (a and b) are equal if they contain exactly the same elements. We say set a as a subset of b if everything in a is also in b (a set is also a subset of itself) {5,7,9} is not a sub set of {5,7,10} The empty set is a subset of all sets. Example: write out all the subsets of {lobster, 100, !}