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
KEYWORD
nonn,more
AUTHOR
Louis J. Billera (billera(AT)cornell.edu), Oct 06 2010
STATUS
approved