Chapter 2 Flashcards
(39 cards)
N
Natural numbers {0,1,2,3….}
Z
Integers
Z+
Positive integers
Q
Rational numbers
R
Real numbers
C
Complex numbers
Singleton set
Set with one element
Order doesn’t matter in a ___
Set
Repetition doesn’t matter in a ____
set
a∈A
a is an element of A
A⊆B
A is a subset of B
A⊂B
A is a proper set of B
Proper sets
Sets that don’t include elements of a larger set
Cardinality
Size of set
____ is a subset of any set
The null set
Power sets
Set of all subsets
Set of n elements has ____ subsets
2^n subsets (includes null set)
Cartesian product
Set of all ORDERED pairs
Num of pairs in cartesian product
Equals n of first set x n of second set
A - B (difference)
elems in A but not in B
f: A –> B [Domain?]
A
f: A –> B [CoDomain?]
B
Injective function
One-to-one
Surjective function
If ever elem of codomain has a projection onto it from domain
