| Argument Position | Prohibited Expression |
|---|---|
| Argument 1 | ¬_ |
| Argument Position | Prohibited Expression |
|---|---|
| Argument 1 | ¬_ |
a a proper subset of b?
| Position | Name | Type | Description | |
|---|---|---|---|---|
| Parameters | ||||
| 1 | a | set | ||
| 2 | b | set | ||
| Returns | boolean | true if a is a proper subset of b, false otherwise. | ||