Set that does not contain any elements.
In a Venn diagram, an empty subset is represented by a cross-hatched region.
Symbol
An empty set is represented by either of the symbols “Ø” or “{ }”.
Example
In this representation, the set G \ (E ∪ F) is empty. G \ (E ∪ F)= Ø. This empty region is cross-hatched.
