An Analytic counting Framework for the generalised Erdős box problem

Abstract

In this article, we develop an $r-$uniform analogue of the classical Kövári--Sós--Turán inequality. This yields an alternative proof of Erdős's classical upper bound for complete $r$-partite $r$-uniform hypergraphs. More precisely, we establish that for finite non-empty sets $A_1,\dots ,A_r$ with $|A_1|\le \cdots \le |A_r|$ and sufficiently large positive integer $n$, \[\mathrm{ex}(n,\mathbb{K}^{(r)}[A_{1},\ldots,A_{r}])=O\left(n^{r-\frac{1}{|A_{1}|\ldots|A_{r-1}|}}\right).\] Our proof develops an analytic counting framework based on repeated applications of Hölder's inequality and the enumeration of configurations through multiple sums. The argument combines the principle of inclusion--exclusion with a discrete analogue of Fubini's theorem to obtain recursive estimates for extremal quantities. This provides a unified analytic perspective on the generalized Erdős box problem.

arXiv comment15 pages