New congruences involving harmonic numbers
Fuente:
arXiv
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| Formato: | Preprint |
| Publicado: |
2014
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| _version_ | 1866914635859361792 |
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| author | Sun, Zhi-Wei |
| author_facet | Sun, Zhi-Wei |
| contents | Let $p>3$ be a prime. For any $p$-adic integer $a$, we determine $$\sum_{k=0}^{p-1}\binom{-a}k\binom{a-1}kH_k,\ \ \sum_{k=0}^{p-1}\binom{-a}k\binom{a-1}kH_k^{(2)},\ \ \sum_{k=0}^{p-1}\binom{-a}k\binom{a-1}k\frac{H_k^{(2)}}{2k+1}$$ modulo $p^2$, where $H_k=\sum_{0<j\le k}1/j$ and $H_k^{(2)}=\sum_{0<j\le k}1/j^2$. In particular, we show that \begin{gather*}\sum_{k=0}^{p-1}\binom{-a}k\binom{a-1}kH_k\equiv(-1)^{\langle a\rangle_p}\,2\left(B_{p-1}(a)-B_{p-1}\right)\pmod p, \\\sum_{k=0}^{p-1}\binom{-a}k\binom{a-1}kH_k^{(2)}\equiv -E_{p-3}(a)\pmod p, \\(2a-1)\sum_{k=0}^{p-1}\binom{-a}k\binom{a-1}k\frac{H_k^{(2)}}{2k+1}\equiv B_{p-2}(a)\pmod p, \end{gather*} where $\langle a\rangle_p$ stands for the least nonnegative integer $r$ with $a\equiv r\pmod{p}$, and $B_n(x)$ and $E_n(x)$ denote the Bernoulli polynomial of degree $n$ and the Euler polynomial of degree $n$ respectively. We also pose some new conjectures on congruences. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_1407_8465 |
| institution | arXiv |
| publishDate | 2014 |
| record_format | arxiv |
| spellingShingle | New congruences involving harmonic numbers Sun, Zhi-Wei Number Theory 11A07, 11B65, 05A10, 11B68, 11B75 Let $p>3$ be a prime. For any $p$-adic integer $a$, we determine $$\sum_{k=0}^{p-1}\binom{-a}k\binom{a-1}kH_k,\ \ \sum_{k=0}^{p-1}\binom{-a}k\binom{a-1}kH_k^{(2)},\ \ \sum_{k=0}^{p-1}\binom{-a}k\binom{a-1}k\frac{H_k^{(2)}}{2k+1}$$ modulo $p^2$, where $H_k=\sum_{0<j\le k}1/j$ and $H_k^{(2)}=\sum_{0<j\le k}1/j^2$. In particular, we show that \begin{gather*}\sum_{k=0}^{p-1}\binom{-a}k\binom{a-1}kH_k\equiv(-1)^{\langle a\rangle_p}\,2\left(B_{p-1}(a)-B_{p-1}\right)\pmod p, \\\sum_{k=0}^{p-1}\binom{-a}k\binom{a-1}kH_k^{(2)}\equiv -E_{p-3}(a)\pmod p, \\(2a-1)\sum_{k=0}^{p-1}\binom{-a}k\binom{a-1}k\frac{H_k^{(2)}}{2k+1}\equiv B_{p-2}(a)\pmod p, \end{gather*} where $\langle a\rangle_p$ stands for the least nonnegative integer $r$ with $a\equiv r\pmod{p}$, and $B_n(x)$ and $E_n(x)$ denote the Bernoulli polynomial of degree $n$ and the Euler polynomial of degree $n$ respectively. We also pose some new conjectures on congruences. |
| title | New congruences involving harmonic numbers |
| topic | Number Theory 11A07, 11B65, 05A10, 11B68, 11B75 |
| url | https://arxiv.org/abs/1407.8465 |