中文

对数凹性与限制划分函数的乘法性质

数论 2025-05-13 v4

摘要

划分函数 p(n)p(n) 及其许多相关的限制划分函数最近被独立证明满足对数凹性:对于 n26n\geq 26p(n)2p(n1)p(n+1)p(n)^2 \geq p(n-1)p(n+1);并且满足不等式:对于 nm2n\geq m\geq 2p(n)p(m)p(n+m)p(n)p(m) \geq p(n+m),且仅有有限多个等号成立或不等式不成立的实例。本文证明了这并非巧合,任何满足特定初始条件的对数凹序列 {xn}\{x_n\} 同样满足不等式 xnxmxn+mx_nx_m \geq x_{n+m}。本文进一步确定这些条件是充分的但非必要的,并考虑了各种实例以阐明这一情况。

关键词

引用

@article{arxiv.2404.03153,
  title  = {Log-concavity And The Multiplicative Properties of Restricted Partition Functions},
  author = {Arindam Roy},
  journal= {arXiv preprint arXiv:2404.03153},
  year   = {2025}
}

备注

results of this article were first reported on July, 2023. In this version we have updated our main theorem and provided new examples