\sqsupsetThe symbol \sqsupset is used to denote a square superset relation in mathematical expressions. It is often used in set theory to indicate that one set is a superset of another, with a square symbol to emphasize the relation.
Set A is a square superset of set B.
A \sqsupset BThe set {1, 2, 3} is a square superset of the set {2, 3}.
\{1, 2, 3\} \sqsupset \{2, 3\}Set X is a square superset of the empty set.
X \sqsupset \emptyset