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(Homo) Flatness of posets on poideal extensions

โœ Scribed by Akbar Golchin; Parisa Rezaei

Publisher
Springer
Year
2009
Tongue
English
Weight
317 KB
Volume
79
Category
Article
ISSN
0037-1912

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Linear extensions of finite posets and a
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โœ Gwihen Etienne ๐Ÿ“‚ Article ๐Ÿ“… 1984 ๐Ÿ› Elsevier Science ๐ŸŒ English โš– 416 KB

We pmve a conjecture of G. Kreweras on the number of solutions of the equation xy = z for permutations of a given signature. Let x be a permutation of [n) = (1,2, . . . , n), R an integer \\*2. The signanue of x k~ the (n-l)-tuple e =(el, e2,. . . . , E,,-~) where Ei is the sign + if q : P. of the e