Relation MEMBER

Slots on this relation:

The sentence {tt (member $tau_1$ $tau_2$)} is true if and only if the object denoted by $tau_1$ is contained in the set denoted by $tau_2$. As mentioned above, an object can be a member of another object if and only if the former is bounded and the latter is a set.
Arity: 2
Domain: Bounded
Range: Set