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A171737
Number of new extreme inequalities for the flag f-vectors of graded posets of rank n that do not come from those of lower ranks.
0
0, 0, 0, 1, 7, 665
OFFSET
1,5
COMMENTS
The extremes represent the strongest linear inequalities holding for the flag f-vectors of graded posets of these ranks. The flag f-vector counts all chains having prescribed rank sets.
LINKS
Billera, L. J. and G. Hetyei, Linear inequalities for flags in graded partially ordered sets, Journal of Combinatorial Theory, Series A, 89 (2000), 77-104. arXiv:math.CO/9706220.
CROSSREFS
Sequence in context: A344049 A347507 A074282 * A013568 A174853 A228928
KEYWORD
nonn,more
AUTHOR
Louis J. Billera (billera(AT)cornell.edu), Oct 06 2010
STATUS
approved