出典:Wiktionary
ordered set (複数形 ordered sets)
出典:Wikipedia
出典:『Wikipedia』 (2011/06/06 06:29 UTC 版)
In order theory in mathematics, a set with a binary relation R on its elements that is reflexive (for all a in the set, aRa), antisymmetric (if aRb and bRa, then a = b) and transitive (if aRb and bRc, then aRc) is described as a partially ordered set or poset. If the binary relation is antisymmetric, transitive and also total (for all a and b in the set, aRb or bRa), then the set is a totally ordered set. If every non-empty subset has a least element, then the set is a well-ordered set.
the Composite order
have a set
受注した
place an order for
the smart set