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  SymmetricRelation

 Sigma KEE - SymmetricRelation
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対称関係
BinaryRelation ?REL は、すべての ?INST1 および ?INST2 に対して (?REL ?INST1 ?INST2) が (?REL ?INST2 ?INST1) の場合にのみ対称である。
Relationships      
Parents 2項関係 BinaryRelations are relations that are true only of pairs of things. BinaryRelations are represented as slots in frame systems.
Children 同値関係A BinaryRelation is an equivalence relation if it is a ReflexiveRelation, a SymmetricRelation, and a TransitiveRelation.


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