Pseudo-similar points in ordered sets |
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Authors: | Bernd SW Schröder |
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Institution: | Program of Mathematics and Statistics, Louisiana Tech University, Ruston, LA 71272, United States |
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Abstract: | Two points l and h in an ordered set P are called pseudo-similar iff P?{l} is isomorphic to P?{h} and there is no automorphism of P that maps l to h. This paper provides a characterization of ordered sets with at least two pseudo-similar points. Special attention is given to ordered sets with pseudo-similar points l and h so that one of the points is minimal and the other is maximal. These sets will play a key role in the reconstruction of the rank of the removed element in a non-extremal card. |
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Keywords: | Ordered set Pseudo-similar points Reconstruction Maximal card Minimal card Isomorphic cards Set reconstruction |
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