\sqsupseteq
The symbol \sqsupseteq is used to denote a relation where one element is 'square superset or equal to' another element. It is often used in set theory and related mathematical contexts to express that one set is a superset of another set or equal to it, with a square shape indicating a specific type of superset relation.
Set A is a square superset or equal to set B.
A \sqsupseteq B
If X is a square superset or equal to Y, then Y is a subset of X.
X \sqsupseteq Y \Rightarrow Y \subseteq X
Transitive property of the square superset or equal to relation.
P \sqsupseteq Q \wedge Q \sqsupseteq R \Rightarrow P \sqsupseteq R