A null set, also known as an empty set, is a fundamental concept in set theory. It is defined as a set that contains no elements. The null set is typically denoted by the symbol ∅ or by using curly braces, such as {}. Some key points about the null set include: 1. **Unique Set**: There is only one null set, which is unique, meaning that any two null sets are considered to be the same set.
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