English

Divisibility of some binomial sums

Number Theory 2018-08-10 v1 Combinatorics

Abstract

With help of qq-congruence, we prove the divisibility of some binomial sums. For example, for any integers ρ,n2\rho,n\geq 2, k=0n1(4k+1)(2kk)ρ(4)ρ(n1k)0(mod2ρ2n(2nn)).\sum_{k=0}^{n-1}(4k+1) \binom{2k}{k}^\rho \cdot (-4)^{\rho(n-1-k)} \equiv 0\pmod{2^{\rho-2}n\binom{2n}{n}}.

Keywords

Cite

@article{arxiv.1808.03213,
  title  = {Divisibility of some binomial sums},
  author = {He-Xia Ni and Hao Pan},
  journal= {arXiv preprint arXiv:1808.03213},
  year   = {2018}
}

Comments

This is a very preliminary, which maybe contains some minor mistakes

R2 v1 2026-06-23T03:29:02.986Z