Weighted Analytic Torsion for Weighted Digraphs

Abstract

In 2020, Alexander Grigor'yan, Yong Lin and Shing-Tung Yau [4] introduced the Reidemeister torsion and the analytic torsion for digraphs by means of the path complex and the path homology theory. Based on the analytic torsion for digraphs introduced in [4], we consider the notion of weighted analytic torsion for vertex-weighted digraphs. For any non-vanishing real functions $f$ and $g$ on the vertex set, we consider the vertex-weighted digraphs with the weights $(f,g)$. We calculate the $(f,g)$-weighted analytic torsion by examples and prove that the $(f,g)$-weighted analytic torsion only depend on the ratio $f/g$. In particular, if the weight is of the diagonal form $(f,f)$, then the weighted analytic torsion equals to the usual (un-weighted) torsion.