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Tuckey and Stanley.—The Yallala Rapids on the Congo

✍ Scribed by RAE, J.


Book ID
109397528
Publisher
Nature Publishing Group
Year
1877
Tongue
English
Weight
136 KB
Volume
17
Category
Article
ISSN
0028-0836

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We prove combinatorially that the W-polynomials of naturally labeled graded posets of rank 1 or 2 (an antichain has rank 0) are unimodal, thus providing further supporting evidence for the Neggers Stanley conjecture. For such posets we also obtain a combinatorial proof that the W-polynomials are sym