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- Björner, Anders, et al.
(författare)
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Chain polynomials of distributive lattices are 75% unimodal
- 2005
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Ingår i: The Electronic Journal of Combinatorics. - : The Electronic Journal of Combinatorics. - 1097-1440 .- 1077-8926. ; 12:1
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Tidskriftsartikel (refereegranskat)abstract
- It is shown that the numbers c(i) of chains of length i in the proper part L\{0, 1} of a distributive lattice L of length l + 2 satisfy the inequalities c(0) <...< c([l/2]) and c([3l.4]) >... > c(l). This proves 75% of the inequalities implied by the Neggers unimodality conjecture.
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