Intro to Set Theory

We started today with the Quiz - we will certainly have quizzes when listed on the calendar but we may also have other quizzes and assessments that are not listed.  Be ready and on time!!

Today we saw the following new language:

• Set - a collection of objects
• Element - an object in the set
• Subset - a set that is fully contained within a larger set
• Complement - the elements that don't fit into the original set
• A is the Original set then A' is the complement
• Empty Set - a set with no elements in it
• Disjoint Set - 2 sets that have no common elements

There is a lot of notation we need to be aware of

A - is all of the elements in A

n(A) - is the number of elements in A

A\B - is the set of A that does not include any elements of B

B\A - is the set of B that does not include any elements of A

AUB = is the set of elements A OR B

HW:

1.2 P20 #1,2,4,5

1.3 P 32 1,4 and any 5 from 7-15