7 citations · 12 across the 7 of their papers we have counts for
7 papers
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…
The 1/k-Eulerian polynomials and k-Stirling permutations
Shi-Mei Ma, Toufik Mansour
In this paper, we establish a connection between the 1/k-Eulerian polynomials introduced by Savage and Viswanathan (Electron. J. Combin. 19(2012), P9) and k-Stirling permutations.…
Polynomials with only real zeros and the Eulerian polynomials of type D
Shi-Mei Ma
A remarkable identity involving the Eulerian polynomials of type D was obtained by Stembridge (Adv. Math. 106 (1994), p. 280, Lemma 9.1). In this paper we explore an equivalent for…
A family of two-variable derivative polynomials for tangent and secant
Shi-Mei Ma
In this paper we introduce a family of two-variable derivative polynomials for tangent and secant. We study the generating functions for the coefficients of this family of polynomi…
On some binomial coefficients related to the evaluation of tan(nx)
Shi-Mei Ma
The purpose of this paper is to study some binomial coefficients which are related to the evaluation of tan(nx). We present a connection between these binomial coefficients and the…