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Definition of UNIT set?
The unit set of x is the set whose sole member is x. The unit set is to be distinguished from its member: for example, the unit set of the set of days of the week has one member, but that member is itself a set that has seven members.
What is the element of set?
It is a member of a set.
Can numbers be repeated within a set?
To repeat numbers in a set is redundant- it does not change the set since a set is determined by its members. Fir example {1,2,3} = {1,1,2,2,3,3 } . In the second case you are merely repeating yourself. You are saying "I am thinking of a set in which 1 is a member and 1 is a member and 2 is a member and 2 is a member and 3 is a member and 3 is a member." Repeating yourself does not change the set.
What do you call an objects in a set?
An element or member of the set.
Is numeral a member of the set of positive integers?
No. 0 is a numeral but does not belong to the set.
