A subset is denoted using the symbol and is typically used in an expression like this:
In plain language, this means that the set is a subset of the set , but not equal to .
The subset or equal symbol ⊆ is used in math to denote that one set is a subset of another set or is equal to another set.
A superset is denoted by the superset symbol ⊃ and is used to indicate that one set is a superset of another set, but not equal to it.
The superset or equal symbol ⊇ is used in math to denote that one set is a superset of another set or is equal to another set.