Java - How to implement the empty set - ∅?
Assuming that you want to implement set theory concepts such as element, set, collection and relation in Java: How would you represent the *empty set* ∅?

Do I mislead myself, if I think of the NULL concept as it used by the three-valued logic of databases?
Java - How to implement the empty set - ∅?
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Assuming that you want to implement set theory concepts such as element, set, collection and relation in Java: How would you represent the *empty set* ∅?

Do I mislead myself, if I think of the NULL concept as it used by the three-valued logic of databases?