Set
A group of elements
Elements
The individual members in a set, listed within braces
Equivalent sets
Two ore mores sets that have the same number of elements
Equal sets
Two or more sets that are exactly the same- order doesn't matter
Finite set
A set where the elements can be counted
Infinite Set
A set with no end to its members
Empty/null Set
A set with no elements
Subset
A set whose elements are all contained in another larger set
Natural or counting numbers
Starts with one, Therese numbers are the numbers you would count
Whole numbers
Starts with zero, counts on
Integers
It is the set of whole numbers plus their opposites (negatives)
Rational Numbers
Any number that can be written as a fraction, a terminating decimal , or a repeating decimal
Irrational number
Any number that isn't rational, non repeating, nonterminating decimals, plus pie
Real numbers
All numbers (no exceptions)
Positive Integers
It is the set of all positive whole numbers
Complementary Set
The set of all the elements within a particular universal set that are not elements of the given set.
Greater than or Less than
> (opening to the bigger number)
Greater than or equal to
opening to the bigger number
Intersection
The set formed by the elements that belong to two or more sets.
Union
The set formed by combining all the elements of two or more sets.
Set Notation {x | x > 0}
The set of all x such that x is greater than 0