Higher-order Turán inequality for the partition function

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Let p(n)p(n) denote the number of partitions of the positive integer nn, and define

un=p(n+1)p(n−1)p(n)2.u_n=\frac{p(n+1)p(n-1)}{p(n)^2}.

Higher-order partition-function inequality. For n≥2n\geq 2,

4(1−νn)(1−νn+1)<(1+π24n3/2)(1−νnνn+1)2.4(1-\nu_n)(1-\nu_{n+1})<\left(1+\frac{\pi}{\sqrt{24}n^{3/2}}\right)(1-\nu_n\nu_{n+1})^2.

This is presented as a higher-order analogue of a conjecture of DeSalvo and Pak. The supplied text does not state that this inequality has been proved or disproved, so its resolution is unclear.

References

Primary source

William Y. C. Chen, Dennis X. Q. Jia and Larry X. W. Wang, “Higher Order Turán Inequalities for the Partition Function”, arXiv:1706.10245 (2017).

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