\supsetThe symbol \supset is used to denote a superset relation in set theory. It indicates that one set contains all the elements of another set, but may also contain additional elements.
Set A is a superset of set B, meaning A contains all elements of B.
A \supset BThe set \{1, 2, 3\} is a superset of the set \{2, 3\}.
\{1, 2, 3\} \supset \{2, 3\}Set X is a superset of set Y, and set Y is a superset of set Z.
X \supseteq Y \supset Z