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  SymmetricRelation

 Sigma KEE - SymmetricRelation
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relation sym�trique
A BinaryRelation ?REL is symmetric just iff (?REL ?INST1 ?INST2) imples (?REL ?INST2 ?INST1), for all ?INST1 and ?INST2.
Relationships      
Parents relation binaire BinaryRelations are relations that are true only of pairs of things. BinaryRelations are represented as slots in frame systems.
Children relation �quivalenteA BinaryRelation is an equivalence relation if it is a ReflexiveRelation, a SymmetricRelation, and a TransitiveRelation.


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