\varsupsetneqThe symbol \varsupsetneq is used in mathematics to denote a strict superset relationship that is not equal. It indicates that one set is a superset of another set, but the two sets are not identical. This is a negated relation because it explicitly states that the sets are not equal, even though one contains all elements of the other and possibly more.
Set A is a strict superset of set B, meaning A contains all elements of B and more.
A \varsupsetneq BThe set {1, 2, 3} is a strict superset of the set {1, 2}.
\{1, 2, 3\} \varsupsetneq \{1, 2\}Set X is a strict superset of set Y, indicating X has all elements of Y plus additional elements.
X \varsupsetneq Y