81 citations · 484 across the 73 of their papers we have counts for
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math.CO2014★ 38 cited
Symmetric unimodal expansions of excedances in colored permutations
Heesung Shin, Jiang Zeng
We consider several generalizations of the classical -positivity of Eulerian polynomials (and their derangement analogues) using generating functions and combinatorial theory of…
math.CO2014
The -positivity of basic Eulerian polynomials via group actions
Zhicong Lin, Jiang Zeng
We provide combinatorial interpretation for the -coefficients of the basic Eulerian polynomials that enumerate permutations by the excedance statistic and the major index as wel…