85 citations · 228 across the 50 of their papers we have counts for
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The cycle descent statistic on permutations
Jun Ma, Shimei Ma, Yeong-Nan Yeh +1
In this paper we study the cycle descent statistic on permutations. Several involutions on permutations and derangements are constructed. Moreover, we construct a bijection between…
Laplacian Coefficient, Matching Polynomial and Incidence Energy of of Trees with Described Maximum Degree
Ya-Lei Jin, Yeong-Nan Yeh, Xiao-Dong Zhang
Let be the characteristic polynomial of its Laplacian matrix of a tree . This paper studied some properties of the generat…
Stirling permutations, cycle structures of permutations and perfect matchings
Shi-Mei Ma, Yeong-Nan Yeh
In this paper we provide a unified combinatorial approach to establish a connection between Stirling permutations, cycle structures of permutations and perfect matchings. The main…
Derivative polynomials and enumeration of permutations by their alternating descents
Shi-Mei Ma, Yeong-Nan Yeh
In this paper we present an explicit formula for the number of permutations with a given number of alternating descents. Moreover, we study the interlacing property of the real par…