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We define a new weighted zeta function for a finite digraph and obtain its determinant expression called the Ihara expression. The graph zeta function is a generalization of the weighted graph zeta function introduced in previous research.…

Combinatorics · Mathematics 2022-09-27 Ayaka Ishikawa

In this paper, we give a more direct proof of the results by Clair and Mokhtari-Sharghi on the zeta functions of periodic graphs. In particular, using appropriate operator-algebraic techniques, we establish a determinant formula in this…

Operator Algebras · Mathematics 2008-10-10 Daniele Guido , Tommaso Isola , Michel L. Lapidus

The definitions and main properties of the Ihara and Bartholdi zeta functions for infinite graphs are reviewed. The general question of the validity of a functional equation is discussed, and various possible solutions are proposed.

Operator Algebras · Mathematics 2022-04-25 Daniele Guido , Tommaso Isola

The theory of Ihara zeta functions is extended to infinite graphs which are weighted and of finite total weight. In this case one gets meromorphic instead of rational functions and the classical determinant formulas of Bass and Ihara hold…

Number Theory · Mathematics 2017-09-04 Antonius Deitmar

We establish a generalized Ihara zeta function formula for simple graphs with bounded degree. This is a generalization of the formula obtained by G. Chinta, J. Jorgenson and A. Karlsson from a vertex-transitive graph.

Combinatorics · Mathematics 2018-01-03 Taichi Kousaka

Starting with Ihara's work in 1968, there has been a growing interest in the study of zeta functions of finite graphs, by Sunada, Hashimoto, Bass, Stark and Terras, Mizuno and Sato, to name just a few authors. Then, Clair and…

Operator Algebras · Mathematics 2009-09-29 Daniele Guido , Tommaso Isola , Michel L. Lapidus

We put forward the concept of measure graphs. These are (possibly uncountable) graphs equipped with an action of a groupoid and a measure invariant under this action. Examples include finite graphs, periodic graphs, graphings and…

Metric Geometry · Mathematics 2018-01-10 Daniel Lenz , Felix Pogorzelski , Marcel Schmidt

We define a zeta function of a graph by using the time evolution matrix of a general coined quantum walk on it, and give a determinant expression for the zeta function of a finite graph. Furthermore, we present a determinant expression for…

Combinatorics · Mathematics 2019-10-29 Takashi Komatsu , Norio Konno , Iwao Sato

We consider the generalized weighted zeta function for a finite digraph, and show that it has the Ihara expression, a determinant expression of graph zeta functions, with a certain specified definition for inverse arcs. A finite digraph in…

Combinatorics · Mathematics 2023-04-04 Ayaka Ishikawa , Hideaki Morita

From the viewpoint of quantum walks, the Ihara zeta function of a finite graph can be said to be closely related to its evolution matrix. In this note we introduce another kind of zeta function of a graph, which is closely related to, as to…

Mathematical Physics · Physics 2014-04-08 Yu. Higuchi , N. Konno , I. Sato , E. Segawa

Stark and Terras introduced the edge zeta function of a finite graph in 1996. The edge zeta function is the reciprocal of a polynomial in twice as many variables as edges in the graph and can be computed in polynomial time. We look at graph…

Combinatorics · Mathematics 2007-08-15 Christopher K. Storm

We define a zeta function of a finite graph derived from time evolution matrix of quantum walk, and give its determinant expression. Furthermore, we generalize the above result to a periodic graph.

Combinatorics · Mathematics 2021-05-06 Takashi Komatsu , Norio Konno , Iwao Sato

The Ihara expression of a weighted zeta function for a general finite digraph is given. It unifies all the Ihara expressions obtained for known zeta functions for finite digraphs. Any digraph in this paper permits multi-edges and…

Combinatorics · Mathematics 2022-02-15 Ayaka Ishikawa , Hideaki Morita , Iwao Sato

We establish the quaternionic weighted zeta function of a graph and its Study determinant expressions. For a graph with quaternionic weights on arcs, we define a zeta function by using an infinite product which is regarded as the Euler…

Combinatorics · Mathematics 2015-09-28 Norio Konno , Hideo Mitsuhashi , Iwao Sato

Conjecturally, almost all graphs are determined by their spectra. This problem has also been studied for variants such as the spectra of the Laplacian and signless Laplacian. Here we consider the problem of determining graphs with Ihara and…

Combinatorics · Mathematics 2015-09-02 Christina Durfee , Kimball Martin

In this paper, we study graph-theoretic analogies of the Mertens' theorems by using basic properties of the Ihara zeta-function. One of our results is a refinement of a special case of the dynamical system Mertens' second theorem due to…

Number Theory · Mathematics 2015-07-03 Takehiro Hasegawa , Seiken Saito

The infinite grid is the Cayley graph of $\mathbb{Z} \times \mathbb{Z}$ with the usual generators. In this paper, the Ihara zeta function for the infinite grid is computed using elliptic integrals and theta functions. The zeta function of…

Number Theory · Mathematics 2013-06-25 Bryan Clair

We construct spectral zeta functions for the Dirac operator on metric graphs. We start with the case of a rose graph, a graph with a single vertex where every edge is a loop. The technique is then developed to cover any finite graph with…

Mathematical Physics · Physics 2016-10-13 J. M. Harrison , T. Weyand , K. Kirsten

We introduce a generalized Grover matrix of a graph and present an explicit formula for its characteristic polynomial. As a corollary, we give the spectra for the generalized Grover matrix of a regular graph. Next, we define a zeta function…

Combinatorics · Mathematics 2022-01-12 Takashi Komatsu , Norio Konno , Iwao Sato , Shunya Tamura

We introduce a generalized Bartholdi zeta function for simple graphs with bounded degree. This zeta function is a generalization of both the Bartholdi zeta function which was introduced by L.~Bartholdi and the Ihara zeta function which was…

Combinatorics · Mathematics 2018-01-18 Taichi Kousaka
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