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Difference between revisions of "Anti-isomorphism of partially ordered sets"

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A bijective antitone mapping of a partially ordered set <img align="absmiddle" border="0" src="https://www.encyclopediaofmath.org/legacyimages/a/a012/a012630/a0126301.png" /> into a partially ordered set <img align="absmiddle" border="0" src="https://www.encyclopediaofmath.org/legacyimages/a/a012/a012630/a0126302.png" />, for which the inverse is also antitone, i.e. a one-to-one mapping <img align="absmiddle" border="0" src="https://www.encyclopediaofmath.org/legacyimages/a/a012/a012630/a0126303.png" /> such that <img align="absmiddle" border="0" src="https://www.encyclopediaofmath.org/legacyimages/a/a012/a012630/a0126304.png" /> (<img align="absmiddle" border="0" src="https://www.encyclopediaofmath.org/legacyimages/a/a012/a012630/a0126305.png" />) implies <img align="absmiddle" border="0" src="https://www.encyclopediaofmath.org/legacyimages/a/a012/a012630/a0126306.png" /> in <img align="absmiddle" border="0" src="https://www.encyclopediaofmath.org/legacyimages/a/a012/a012630/a0126307.png" /> (and similarly for the inverse).
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A [[bijection|bijective]] [[antitone mapping]] of a [[partially ordered set]] $ A $ into a partially ordered set $ B $, for which the [[inverse mapping]] is also antitone, i.e., a [[Injection|one-to-one mapping]] $ \phi : A \rightarrow B $ such that $ a < b $ in $ A $ implies $ \phi(a) > \phi(b) $ in $ B $ (and similarly for the inverse).
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[[Category:Order, lattices, ordered algebraic structures]]

Latest revision as of 02:54, 9 January 2017

A bijective antitone mapping of a partially ordered set $ A $ into a partially ordered set $ B $, for which the inverse mapping is also antitone, i.e., a one-to-one mapping $ \phi : A \rightarrow B $ such that $ a < b $ in $ A $ implies $ \phi(a) > \phi(b) $ in $ B $ (and similarly for the inverse).

How to Cite This Entry:
Anti-isomorphism of partially ordered sets. Encyclopedia of Mathematics. URL: http://encyclopediaofmath.org/index.php?title=Anti-isomorphism_of_partially_ordered_sets&oldid=17910
This article was adapted from an original article by O.A. Ivanova (originator), which appeared in Encyclopedia of Mathematics - ISBN 1402006098. See original article