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Your search keyword '"Fu, Shishuo"' showing total 4 results
Start Over Author "Fu, Shishuo" Publisher elsevier b.v.
4 results on '"Fu, Shishuo"'

3. On two unimodal descent polynomials.

Author

Fu, Shishuo, Lin, Zhicong, and Zeng, Jiang

Subjects
*POLYNOMIALS, *EULER'S numbers, *PERMUTATIONS, *LOGICAL prediction, *COMPUTATIONAL mathematics, *SEPARABLE algebras, *COMBINATORICS
Abstract

The descent polynomials of separable permutations and derangements are both demonstrated to be unimodal. Moreover, we prove that the γ -coefficients of the first are positive with an interpretation parallel to the classical Eulerian polynomial, while the second is spiral, a property stronger than unimodality. Furthermore, we conjecture that they are both real-rooted. [ABSTRACT FROM AUTHOR]

Published
2018
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4. On certain unimodal sequences and strict partitions.

Author

Fu, Shishuo and Tang, Dazhao

Subjects
*BIJECTIONS, *GENERATING functions
Abstract

Building on a bijection of Vandervelde, we enumerate certain unimodal sequences whose alternating sum equals zero. This enables us to refine the enumeration of strict partitions with respect to the number of parts and the BG-rank. [ABSTRACT FROM AUTHOR]

Published
2020
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