A physical method for the analysis of the Riemann zeta function and the L-function

Zheng Chun-Xiao Beijing National Day School

S.-T. Yau High School Science Awarded Papers mathscidoc:1801.35025

Yau Science Award (Math), 2017.12
A physical method is developed to analyze the Riemann zeta function and the L-function. First, a physical model of an elastic bar fixed at both ends and subjected to symmetric axial loads with respect to the mid-span is constructed. The axial force of the bar at the left end is calculated with two methods: the equilibrium of forces and the principle of minimum potential energy. With the help of the orthogonality of {sinix} (i 1, 2, 3, ) , the Parseval identity and the Bessel inequality of the physical model are obtained. Further, it is proven that, in all the possible displacements which satisfy the boundary conditions, the real one minimizes the total potential energy of the bar. With the equivalence of the two methods, an identity of a type of infinite series is derived. Based on the identity, L(1) , L(3) , a recurrence formula of L(2k 1) (k  3) ,  (2) ,  (4) , and a relationship between  (2k) (k  2) and L(2i 1) (i  1, 2, ..., k) are then deduced with power axial load functions. The upper and lower bounds for the Riemann zeta function  (2k -1) and the L-function L(2k) are given. The numerical results show that the upper and lower bounds are in excellent agreement with the accurate value. Finally, two improvement methods are proposed for estimating the circumference ratio. The numerical results show that the two methods can estimate the circumference ratio with high accuracy and that the L -function is more efficient than the Riemann zeta function in estimating the circumference ratio.
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@inproceedings{zheng2017a,
  title={A physical method for the analysis of the Riemann zeta function and the L-function},
  author={Zheng Chun-Xiao},
  url={http://archive.ymsc.tsinghua.edu.cn/pacm_paperurl/20180118025355268758899},
  booktitle={Yau Science Award (Math)},
  year={2017},
}
Zheng Chun-Xiao. A physical method for the analysis of the Riemann zeta function and the L-function. 2017. In Yau Science Award (Math). http://archive.ymsc.tsinghua.edu.cn/pacm_paperurl/20180118025355268758899.
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