Chapter R - Review of Basic Concepts - R.1 Sets - R.1 Exercises - Page 8: 80

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RECALL: (1) The symbol $\cap$ represents intersection of sets (2) The intersection of sets A and B is the set that contains the common elements of A and B. (3) The empty set has no elements. The two sets are both empty therefore they have no common elements. This means that the intersection of the two sets is $\emptyset$. Thus, the given statement is true.