Let F be an algebraic number field. Recently, L. Weng introduced zeta functions of rank n associated to F as a generalization of the Iwasawa-Tate zeta integral from the Arakelov geometric point of view. In the article, we call them the Weng zeta function of rank n. In the case of rank one, the Weng zeta function coincide with the Dedekind zeta function of F . The background and precise definiti...

We present a probabilistic Las Vegas algorithm for computing the local zeta function of a hyperelliptic curve of genus g defined over Fq. It is based on the approaches by Schoof and Pila combined with a modelling of the l-torsion by structured polynomial systems. Our main result improves on previously known complexity bounds by showing that there exists a constant c > 0 such that, for any fixed...

All plane curves of degree less than 7 with coefficients in F2 are examined for curves with a large number of Fq rational points on their smooth model, for q = 2,m = 3, 4, ..., 11. Known lower bounds are improved, and new curves are found meeting or close to Serre’s, Lauter’s, and Ihara’s upper bounds for the maximal number of Fq rational points on a curve of genus g.

In [Iha86b], Ihara constructs a universal cocycle Gal ( Q/Q ) −→ Zp[[t0, t1, t∞]]/ ((t0 + 1)(t1 + 1)(t∞ + 1)− 1) arising from the action of Gal ( Q/Q ) on certain quotients of the Jacobians of the Fermat curves

In this paper, we show how to determine several properties of a finite graph G from its Ihara zeta function ZG(u). If G is connected and has minimal degree at least 2, we show how to calculate the number of vertices of G. To do so we use a result of Bass, and in the case that G is nonbipartite, we give an elementary proof of Bass’ result. We further show how to determine whether G is regular, a...

To a polynomial f over a p{adic eld K and a character of the group of units of the valuation ring of K one associates Igusa's local zeta function Z(s; f;), which is a meromorphic function on C. Several theorems and conjectures relate the poles of Z(s; f;) to the monodromy of f; the so{called holomorphy conjecture states roughly that if the order of does not divide the order of any eigenvalue of...

In this manuscript we show that function fields K|k with td(K|k) > dim(k)+1 can be recovered from their maximal pro-` abelian-by-central Galois theory, where dim(k) is the Kronecker dimension. This extends the main result of Pop [P5] beyond the case where k is an algebraic closure of a finite field. We also show how this implies the pro-` form of Ihara’s question / Oda-Matsumoto conjecture I/OM...

For K a field of characteristic zero, let M(K) denote the set of Drinfel’d associators defined over K [Dr]. The variety M is of great interest because of its connection to the deformations of universal enveloping algebras, fundamental group of the Teichmuller tower, and to Gal(Q/Q). There is a natural map M → A and for λ ∈ K, and Mλ is a torsor under GRT1 (= M0). If K << X,Y >> denotes the form...

Call diffeomorphisms satisfying (2) Artin-Mazur (A-M) diffeomorphisms. In [I.1] we give an elementary proof of an extension of Artin–Mazur’s result, namely, we prove that A-M diffeomorphisms with only hyperbolic periodic points are dense in Diffr(M). In [I.2] we construct Baire generic diffeomorphisms inside of an open set (a Newhouse domain) in Diffr(M) of with superexponential (even an arbitr...