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Entity > Abstract > Class > Relation > BinaryRelation > AntisymmetricRelation > AsymmetricRelation > closedOn

closedOn
subject			fact

closedOn	documentation A BinaryFunction is closed on a Class if it is defined for all instances of the Class and its value is always an instance of the Class
	has axiom (=> (and (closedOn ?FUNCTION ?CLASS) (instance ?FUNCTION UnaryFunction)) (forall (?INST) (=> (instance ?INST ?CLASS) (instance (AssignmentFn ?FUNCTION ?INST) ?CLASS))))
	has axiom (=> (and (closedOn ?FUNCTION ?CLASS) (instance ?FUNCTION BinaryFunction)) (forall (?INST1 ?INST2) (=> (and (instance ?INST1 ?CLASS) (instance ?INST2 ?CLASS)) (instance (AssignmentFn ?FUNCTION ?INST1 ?INST2) ?CLASS))))
	has domain1 Function
	has domain2 Class
	is an instance of AsymmetricRelation
	is an instance of BinaryPredicate
BinaryRelation	is first domain of DomainFn
	is first domain of equivalenceRelationOn
	is first domain of inverse
	is first domain of irreflexiveOn
	is first domain of partialOrderingOn
	is first domain of RangeFn
	is first domain of reflexiveOn
	is first domain of totalOrderingOn
	is first domain of trichotomizingOn
	is second domain of inverse
Predicate	is first domain of singleValued
Class	is third domain of domain
	is third domain of domainSubclass
Abstract	is disjoint from Physical

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