U+22D1 "⋑" Double Superset Unicode Character

U+22D1 "⋑" Double Superset is a mathematical symbol that represents a double superset relationship, typically used in set theory and formal logic to indicate that one set is a superset of another, sometimes with additional connotations of strictness or explicit double containment. It resembles two nested, large square brackets or angle brackets opening outward, and while it is less commonly used than the standard single superset symbol (⊃), it can appear in specialized notations for defining relational structures or in contexts where a more emphatic or distinct symbol is needed to avoid ambiguity with similar characters.