Relationpm#trichotomizing_relation(?,?)this category only serves structuration purposes: it is instance of pm#trichotomizing_relation_type which is not instance of pm#class_of_inheritable_relation_typesubtype: pm#trichotomizing_relation_on_real_number type: pm#trichotomizing_relation_typebinary_relation such that all ordered pairs consisting of distinct individuals are element of this binary_relationsupertype: pm#binary_relation_with_particular_mathematical_property (?,?) supertype: pm#relation_with_particular_mathematical_property (*) supertype: pm#relation_with_particular_property (*)this rather fuzzy type permits to group categorization schemes less common than those covered by the previous sibling categoriessupertype: pm#relation__related_thing__relatedthing___related_with (*)type for any relation (unary, binary, ..., *-ary) and instance of pm#relation_type