961 citations
- Nankai UniversityCN47 papers
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17 papers · 1 filter
On the positive zeros of generalized Narayana polynomials related to the Boros-Moll polynomials
James J. Y. Zhao
The generalized Narayana polynomials arose from the study of infinite log-concavity of the Boros-Moll polynomials. The real-rootedness of had been proved…
Polynomial Reduction and Super Congruences
Qing-Hu Hou, Yan-Ping Mu, Doron Zeilberger
Based on a reduction processing, we rewrite a hypergeometric term as the sum of the difference of a hypergeometric term and a reduced hypergeometric term (the reduced part, in shor…
Upper bounds for bar visibility of subgraphs and n-vertex graphs
Yuanrui Feng, Douglas B. West, Yan Yang
A -bar visibility representation of a graph assigns each vertex up to horizontal bars in the plane so that two vertices are adjacent if and only if some bar for one vertex c…
The thickness of the Kronecker product of graphs
Xia Guo, Yan Yang
The thickness of a graph is the minimum number of planar subgraphs whose union is . In this paper, we present sharp lower and upper bounds for the thickness of the Kronecker…
Several -series related to Ramanujan's theta functions
Dazhao Tang, Ernest. X. W. Xia
Quite recently, the first author investigated vanishing coefficients of the arithmetic progressions in several -series expansions. In this paper, we further study the signs of c…
Signless Laplacian spectral radius and Hamiltonicity of graphs with large minimum degree
Yawen Li, Yao liu, Xing Peng
In this paper, we establish a tight sufficient condition for the Hamiltonicity of graphs with large minimum degree in terms of the signless Laplacian spectral radius and characteri…