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arXiv · 2404.15546

A Modular-Form Framework for Global Optimality in the Asymmetric Traveling-Salesman Problem

Varsha Gupta
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Abstract

In this paper, we develop an alternate formulation of Asymmetric Traveling Salesman Problem (ATSP). The equivalent problem is to find the zeros of a holomorphic cusp form on the principal congruence subgroup, $\Gamma(4) $. The resultant Poincar{\'e} series gives a cusp form whose interior zeros are in bijection with the arc that constitute optimal Hamiltonian cycle. We show that for any weight, $\ell$ and number of directed arcs, $|A|$ such that $4\ell-7<2|A| $, the holomorphic cusp form vanishes at global optimum. Furthermore, a three step filter consisting of Fourier coefficients, Hecke recursions and completed $L$-function parity test provides a scalar certificate for global optimality. The framework is a potential bridge between discrete optimization and number theory suggesting an alternate view on complexity theory.

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Varsha Gupta. 2024-04-23. A Modular-Form Framework for Global Optimality in the Asymmetric Traveling-Salesman Problem. https://arxiv.org/abs/2404.15546

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