On the polynomial sharp upper estimate conjecture in 8-dimensional simplex

Andrew Yang

S.-T. Yau High School Science Awarded Papers mathscidoc:1801.35034

Yau Science Award (Math), 2017.12
Because of its importance in number theory and singularity theory, the problem of nding a polynomial sharp upper estimate of the number of positive integral points in an n- dimensional (n  3) polyhedron has received attention by a lot of mathematicians. S. S.-T. Yau proposed the upper estimate, so-called the Yau Number Theoretic Conjecture. The previous results on the Yau Number Theoretic Conjecture in low dimension cases (n  6) have been proved by using the sharp GLY conjecture. Unfortunately, it is only valid in low dimension. The Yau Number Theoretic Conjecture for n = 7 has been shown with a completely new method in [19]. In this paper, the similar method has been applied to prove the Yau Number Theoretic Conjecture for n = 8, but with more meticulous analyses. The main method of proof is summing existing sharp upper bounds for the number of points in 7-dimensional simplexes over the cross sections of eight-dimensional simplex. This reasearch project paves the way for the proof of a fully general sharp upper bound for the number of lattice points in a simplex. It also moves the mathematical community one step closer towards proving the Yau Number Theoretic Conjecture in full generality. As an application, we give a sharper estimate of the Dickman-De Bruijn function (x; y) for 5  y < 23, compared with the result obtained by Ennola.
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@inproceedings{andrew2017on,
  title={On the polynomial sharp upper estimate conjecture in 8-dimensional simplex},
  author={Andrew Yang},
  url={http://archive.ymsc.tsinghua.edu.cn/pacm_paperurl/20180118031115720904909},
  booktitle={Yau Science Award (Math)},
  year={2017},
}
Andrew Yang. On the polynomial sharp upper estimate conjecture in 8-dimensional simplex. 2017. In Yau Science Award (Math). http://archive.ymsc.tsinghua.edu.cn/pacm_paperurl/20180118031115720904909.
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