Arithmetic properties of generalized Delannoy polynomials and Schröder polynomials
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arXiv
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| Format: | Preprint |
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2025
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| _version_ | 1866915200521732096 |
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| author | Li, Lin-Yue Wang, Rong-Hua |
| author_facet | Li, Lin-Yue Wang, Rong-Hua |
| contents | Let $n$ be any nonnegative integer and \[ D_n^{(h)}(x)=\sum_{k=0}^{n}\binom{n+k}{2k}^{h}\binom{2k}{k}^{h}{x}^{k} \text{ and } S_{n}^{(h)}(x)=\sum_{k=0}^{n}\binom{n+k}{2k}^{h}C_{k}^{h}{x}^{k} \] be the generalized Delannoy polynomials and Schröder polynomials respectively. Here $C_k$ is the Catalan number and $h$ is a positive integer. In this paper, we prove that $$\begin{align*} & \frac{(2,n)}{n(n+1)(n+2)} \sum_{k=1}^{n}k^a(k+1)^a(2k+1)D_{k}^{(h)}(x)^{m}\in\mathbb{Z}[x],\\ &\frac{(2,hm-1,n)}{n(n+1)(n+2)} \sum_{k=1}^{n}(-1)^{k}k^a(k+1)^a(2k+1)D_{k}^{(h)}(x)^{m}\in\mathbb{Z}[x],\\ &\frac{(2,n)}{n(n+1)(n+2)} \sum_{k=1}^{n}k^a(k+1)^a(2k+1)S_{k}^{(h)}(x)^{m}\in\mathbb{Z}[x],\\ &\frac{(2,m-1,n)}{n(n+1)(n+2)} \sum_{k=1}^{n}(-1)^{k}k^a(k+1)^a(2k+1)S_{k}^{(h)}(x)^{m}\in\mathbb{Z}[x]. \end{align*}$$ Taking $a=1$ will confirm some of Z.-W. Sun's conjectures. |
| format | Preprint |
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arxiv_https___arxiv_org_abs_2503_12748 |
| institution | arXiv |
| publishDate | 2025 |
| record_format | arxiv |
| spellingShingle | Arithmetic properties of generalized Delannoy polynomials and Schröder polynomials Li, Lin-Yue Wang, Rong-Hua Number Theory Combinatorics Let $n$ be any nonnegative integer and \[ D_n^{(h)}(x)=\sum_{k=0}^{n}\binom{n+k}{2k}^{h}\binom{2k}{k}^{h}{x}^{k} \text{ and } S_{n}^{(h)}(x)=\sum_{k=0}^{n}\binom{n+k}{2k}^{h}C_{k}^{h}{x}^{k} \] be the generalized Delannoy polynomials and Schröder polynomials respectively. Here $C_k$ is the Catalan number and $h$ is a positive integer. In this paper, we prove that $$\begin{align*} & \frac{(2,n)}{n(n+1)(n+2)} \sum_{k=1}^{n}k^a(k+1)^a(2k+1)D_{k}^{(h)}(x)^{m}\in\mathbb{Z}[x],\\ &\frac{(2,hm-1,n)}{n(n+1)(n+2)} \sum_{k=1}^{n}(-1)^{k}k^a(k+1)^a(2k+1)D_{k}^{(h)}(x)^{m}\in\mathbb{Z}[x],\\ &\frac{(2,n)}{n(n+1)(n+2)} \sum_{k=1}^{n}k^a(k+1)^a(2k+1)S_{k}^{(h)}(x)^{m}\in\mathbb{Z}[x],\\ &\frac{(2,m-1,n)}{n(n+1)(n+2)} \sum_{k=1}^{n}(-1)^{k}k^a(k+1)^a(2k+1)S_{k}^{(h)}(x)^{m}\in\mathbb{Z}[x]. \end{align*}$$ Taking $a=1$ will confirm some of Z.-W. Sun's conjectures. |
| title | Arithmetic properties of generalized Delannoy polynomials and Schröder polynomials |
| topic | Number Theory Combinatorics |
| url | https://arxiv.org/abs/2503.12748 |