Talk:Order (relation)

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 Definition An irreflexive antisymmetric transitive binary relation on a set. [d] [e]
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A nice article.

However, the phrase "An order isomorphism, or simply isomorphism between ordered sets is a monotonic bijection" (in "Mappings of ordered sets" section) is wrong; the inverse map also have to be monotonic. Boris Tsirelson 16:15, 9 October 2010 (UTC)