is an element of set 

is not an element of set 

The set with elements 

The set of allsuch that the statement is true 

The number of elements in set 

The empty set 

or ℇ 
The universal set 
The complement of the set 

The set of natural numbers 1, 2,... 

The set of integers 

The set of positive integers 1, 2,... 

The set of integers modulo 

The set of rational numberswhereand are whole numbers 

The set of positive rational numberswhereand are whole numbers 

The set of positive real numberswith 

The set of non negative real numberswith 

The set of complex numberswhere 

The ordered pair 

The cartesian product of setsand 

is a subset of 

is a proper subset of 

The union of setsand 

The intersection of setsand 

The closed interval 

The open interval 

The half open interval 

is related toby the relationship 

is similar toin the context of some equivalence relation 