9 citations · 49 across the 59 of their papers we have counts for
4 papers · 1 filter
On the unimodality of the Taylor expansion coefficients of Jacobian elliptic functions
Shi-Mei Ma, Jun Ma, Yeong-Nan Yeh +1
The Jacobian elliptic functions are standard forms of elliptic functions, and they were independently introduced by C.G.J. Jacobi and N.H. Abel. In this paper, we study the unimoda…
On certain combinatorial expansions of the Legendre-Stirling numbers
Shi-Mei Ma, Jun Ma, Yeong-Nan Yeh
The Legendre-Stirling numbers of the second kind were introduced by Everitt et al. in the spectral theory of powers of the Legendre differential expressions. In this paper, we prov…
Gamma-positivity and partial gamma-positivity of descent-type polynomials
Shi-Mei Ma, Jun Ma, Yeong-Nan Yeh
In this paper, we study gamma-positivity of descent-type polynomials by introducing the change of context-free grammars method. We first present grammatical proofs of the gamma-pos…
The ascent-plateau statistics on Stirling permutations
Shi-Mei Ma, Jun Ma, Yeong-Nan Yeh
In this paper, several variants of the ascent-plateau statistic are introduced, including flag ascent-plateau, double ascent and descent-plateau. We first study the flag ascent-pla…