\supseteqThe symbol \supseteq is used to denote a superset relation where one set is a superset of another set, including the possibility of being equal. In set theory, A \supseteq B means that set A contains all elements of set B, or A is equal to B.
Set A is a superset of set B, or they are equal.
A \supseteq BThe set \{1, 2, 3\} is a superset of \{2, 3\}.
\{1, 2, 3\} \supseteq \{2, 3\}Any set X is a superset of the empty set.
X \supseteq \emptyset