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Sigma KEE - BinaryRelation
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2項関係
BinaryRelation は relation で、 それは ペアのもののみ当てはまる。 BinaryRelation は、フレームシステムのスロットとして表される。
Relationships      
Parents InheritableRelation The class of Relations whose properties can be inherited downward in the class hierarchy via the subrelation Predicate.
  関係 The Class of relations. There are three kinds of Relation: Predicate, Function, and List. Predicates and Functions both denote sets of ordered n-tuples. The difference between these two Classes is that Predicates cover formula-forming operators, while Functions cover term-forming operators. A List, on the other hand, is a particular ordered n-tuple.
Children 反対称関係BinaryRelation ?REL is an AntisymmetricRelation if for distinct ?INST1 and ?INST2, (?REL ?INST1 ?INST2) implies not (?REL ?INST2 ?INST1). In other words, for all ?INST1 and ?INST2, (?REL ?INST1 ?INST2) and (?REL ?INST2 ?INST1) imply that ?INST1 and ?INST2 are identical. Note that it is possible for an AntisymmetricRelation to be a ReflexiveRelation.
 2進述語A Predicate relating two items - its valence is two.
 EconomicRelationA class of Relations which are used to specify various economic measures, e.g. the GDP, the consumer price index, and the trade deficit.
 非推移関係A BinaryRelation ?REL is intransitive only if (?REL ?INST1 ?INST2) and (?REL ?INST2 ?INST3) imply not (?REL ?INST1 ?INST3), for all ?INST1, ?INST2, and ?INST3.
 非反射関係Relation ?REL is irreflexive iff (?REL ?INST ?INST) holds for no value of ?INST.
 反射関係Relation ?REL is reflexive iff (?REL ?INST ?INST) for all ?INST.
 対称関係 A BinaryRelation ?REL is symmetric just iff (?REL ?INST1 ?INST2) imples (?REL ?INST2 ?INST1), for all ?INST1 and ?INST2.
 推移関係A BinaryRelation ?REL is transitive if (?REL ?INST1 ?INST2) and (?REL ?INST2 ?INST3) imply (?REL ?INST1 ?INST3), for all ?INST1, ?INST2, and ?INST3.
 三分関係A BinaryRelation ?REL is a TrichotomizingRelation just in case all ordered pairs consisting of distinct individuals are elements of ?REL.
 1変数関数The Class of Functions that require a single argument.


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