Function INVERSE

One binary relation is the inverse of another if they are equivalent when their arguments are swapped.

Arity: 2

Domain: Binary-relation

Range: Binary-relation

Axioms:

(<=> (Holds ?Binary-Relation ?X ?Y)
     (Holds (Inverse ?Binary-Relation) ?Y ?X))

(=> (Inverse ?Binary-Relation ?Inverse-Relation)
    (And (Binary-Relation ?Binary-Relation)
         (= ?Inverse-Relation
            (Setofall (Listof ?Y ?X) (Holds ?Binary-Relation ?X ?Y)))))

• Defined in theory: Kif-relations
• Source code: frame-ontology.lisp

Notes:

• Note that INVERSE is a function. It is possible to have more than one relation constant naming the inverse of a relation, but they are all = to each other.