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A046905
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Posets with n points with property that there is no nonsingelton proper subset T for which x not in T implies x<T or x>T or x incomparable with every element of T.
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1
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OFFSET
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0,5
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REFERENCES
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J. A. Wright, There are 718 6-point topologies, quasi-orderings and transgraphs, Notices Amer. Math. Soc., 17 (1970), p. 646, Abstract #70T-A106.
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LINKS
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CROSSREFS
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KEYWORD
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nonn
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AUTHOR
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John A. Wright.
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STATUS
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approved
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