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Effective extensions of partial orders

✍ Scribed by Dev Kumar Roy

Publisher
John Wiley and Sons
Year
1990
Tongue
English
Weight
241 KB
Volume
36
Category
Article
ISSN
0044-3050

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Let P be a finite partial order which does not contain an induced subposet isomorphic with 3+1, and let G be the incomparability graph of P. Gasharov has shown that the chromatic symmetric function X G has nonnegative coefficients when expanded in terms of Schur functions; his proof uses the dual Ja