Relationpm#trichotomizing_relation_on_real_number(sumo#quantity,sumo#quantity) subtype: sumo#less_than sumo#greater_than sumo#less_than_or_equal sumo#greater_than_or_equal supertype: pm#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_typesupertype: 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