1. The problem is to understand the symbol \(\emptyset\), which represents the empty set in mathematics. 2. The empty set is a set that contains no elements. 3. It is denoted by the symbol \(\emptyset\) or sometimes by \(\{\}\). 4. Important rule: The empty set is unique; there is only one empty set. 5. It is a subset of every set because it has no elements to contradict membership. 6. In set theory, the empty set is the foundation for building other sets. Final answer: The symbol \(\emptyset\) represents the empty set, which contains no elements.