Sets Flashcards
0
Q
What are the names of the objects in the set
A
Elements or members
1
Q
What is a set
A
A set is a well defined collection of objects
2
Q
What does #represent
A
Cardinal number
3
Q
What is the cardinal number
A
The cardinal number is the number of objects in a set
4
Q
What are equal sets
A
Sets that have the same elements
5
Q
What are equivalent sets
A
Sets with the same number of elements
6
Q
What is a subset
A
If every element of one set is in the other
7
Q
What is a union
A
A union is everything in the two sets and the intersection
8
Q
What is an intersection
A
A set of element that are in both sets
9
Q
{ }what does this mean
A
An empty or null set
