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20 Cards in this Set
 Front
 Back
natural number

[1,2,3,4,5,6...]


whole numbers

[0,1,2,3,4,5...]


integers

[...5,4,3,2,1,0,1,2,3,4,5...]


rational numbers

numbers whosse decimal representation is an integer, a terminating decimal, or a repeating decimal


Set

a collection of objects


element

anything inside a set is an element of that set


equal sets

if two or more sets have all of the same elements


subset

everything in set A is in set B. Everything in set B does not have to be in set A.


proper subset

if every element in set A is in set B but set A is not = to set B.


complement of a set

all element in the universal set that are not in the set beind examined.


intersection of sets

all elements that 2 or more sets have in common.


union of sets

all the elements in 2 or more sets combined


difference of sets

the set of all elements in one set that are not in another set.


cartesian product of 2 sets

AxB, All ordered pairs with A=X and B=Y


cardinal number (or cardinality) of a set

the number of elements in a set


E

is an element of


C
 
can or cannot be equal sets


C

definitely equal sets


how do you determine how many subsets a given set has?

the # of subsets of a set with N elements is 2n.


How do you determine how many proper subsets a given set has?

the # of proper subsets of a set with n elements is 2n1
