Inequalities for the sequences with unified form
Abstract We consider a class of sequence $c(n)$ with the following asymptotic form: $$ \begin{align*}c(n) \sim \frac C{n^\kappa} \exp\left(\sum_{\lambda\in\mathcal S}A_\lambda n^\lambda \right) \sum_{\mu\in\mathcal T} \frac{\beta_\mu}{n^\mu} \qquad (n \to \infty).\end{align*} $$ We give criteria for the Turán inequality of any order, the double Turán inequality, and the Laguerre inequality of any order of $c(n)$ for sufficiently large n . We also give the companion inequalities for the Turán inequality and the Laguerre inequality of any order for $c(n)$ . As applications, we will show that the numbers of commuting $\ell $ -tuples in $S_n$ , the partition without sequence, the plane partition, the partition into k -gonal numbers, the finite-dimensional representations of groups $\mathfrak {su}(3)$ and $\mathfrak {so}(5),$ and the coefficients of infinite product generating functions asymptotically satisfy these inequalities. Some of them settle open problems proposed by Bringmann, Franke, and Heim.
Authors
- Li-Mei Dou
- Zhen-Yu Gao
- Xingwei Wang (ORCID: https://orcid.org/0000-0002-9579-3837)
Institutions
- Nankai University (CN)
Publication Details
- Journal
- Canadian Journal of Mathematics
- Published
- 2025-11-20
- DOI
- https://doi.org/10.4153/s0008414x25101661
- Primary Topic
- Mathematical Inequalities and Applications
- Type
- article
- Field-Weighted Citation Impact
- 0.00
Funders
- National Science Foundation
- National Natural Science Foundation of China