The set of people who answered this question before I did.
There is only one empty set (a consequence of the Axiom of Extensionality). So the above answer is correct, and is equal to every other example.
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Because its still a set, although its empty or nothing in that set {} {0} * * * * * The second example above is NOT of an empty set: it is the set that contains the number zero.
There is only one empty set - the universal empty set. It is a set that contains no elements. It is usually denoted by { } or the Greek letter phi = Φ (not pi = π).
Yes,an empty set is the subset of every set. The subset of an empty set is only an empty set itself.
The empty set is a set that has no elements.
The only subset of an empty set is the empty set itself.