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We prove the existence of curves of genus $7$ and $12$ over the field with $11^5$ elements, reaching the Hasse-Weil-Serre upper bound. These curves are quotients of modular curves and we give explicit equations. We compute the number of…

Number Theory · Mathematics 2025-04-30 Valerio Dose , Guido Lido , Pietro Mercuri , Claudio Stirpe

A superspecial curve is a (non-singular) curve over a field of positive characteristic whose Jacobian variety is isomorphic to a product of supersingular elliptic curves over the algebraic closure. It is known that for given genus and…

Algebraic Geometry · Mathematics 2021-10-04 Momonari Kudo

We study the class field theory of curve defined over two dimensional local field. The approch used here is a combination of the work of Kato-Saito, and Yoshida where the base field is one dimensional

Algebraic Geometry · Mathematics 2007-05-23 Belgacem Draouil

We study the symmetry groups and winding numbers of planar curves obtained as images of weighted sums of exponentials. More generally, we study the image of the complex unit circle under a finite or infinite Laurent series using a…

Combinatorics · Mathematics 2025-01-15 Florian Pausinger , David Petrecca

Discrete point cloud objects lack sufficient shape descriptors of 3D geometries. In this paper, we present a novel method for aggregating hypothetical curves in point clouds. Sequences of connected points (curves) are initially grouped by…

Computer Vision and Pattern Recognition · Computer Science 2021-07-30 Tiange Xiang , Chaoyi Zhang , Yang Song , Jianhui Yu , Weidong Cai

We use fine curve graph tools to prove that there exist parabolic isometries of graphs of curves associated to surfaces of infinite type.

Geometric Topology · Mathematics 2026-05-14 Federica Fanoni , Sebastian Hensel

Hive plots are a graph visualization style placing vertices on a set of radial axes emanating from a common center and drawing edges as smooth curves connecting their respective endpoints. In previous work on hive plots, assignment to an…

Computational Geometry · Computer Science 2023-09-06 Martin Nöllenburg , Markus Wallinger

We extend the group law of curves of degree three by chords and tangents to the Jacobi variety of plane curves of degree n>4 by replacing points by point groups and lines by algebraic curves. The curves are nonsingular or have simple…

Algebraic Geometry · Mathematics 2007-05-23 Frank Leitenberger

We give a method of counting the number of curves with a given type of singularity in a suitably ample linear series on a smooth surface using punctual Hilbert schemes. The types of singulaties for which our methods suffice include the…

Algebraic Geometry · Mathematics 2007-05-23 Heather Russell

We complete the solution of the relative class number one problem for function fields of curves over finite fields. Using work from two earlier papers, this reduces to finding all function fields of genus 6 or 7 over $\mathbb{F}_2$ with one…

Number Theory · Mathematics 2024-01-01 Kiran S. Kedlaya

Let $\epsilon>0$. In this article we will present a deterministic algorithm which does the following. The input is a hyperelliptic curve $C$ of genus $g$ over a finite field $k$ of cardinality $q$ given by $y^2+h(x)y=f(x)$ such that the…

Number Theory · Mathematics 2014-02-27 Michiel Kosters

We construct isotrivial and non-isotrivial elliptic curves over $\mathbb{F}_q(t)$ with an arbitrarily large set of separable integral points. As an application of this construction, we prove that there are isotrivial log-general type…

Number Theory · Mathematics 2012-11-06 Ricardo Conceição

We determine the maximum number of rational points on a curve over $\mathbb{F}_2$ with fixed gonality and small genus.

Number Theory · Mathematics 2022-08-09 Xander Faber , Jon Grantham

We bound the genus of a projective curve lying on a complete intersection surface in terms of its degree and the degrees of the defining equations of the surface on which it lies.

Algebraic Geometry · Mathematics 2014-09-04 Rebecca Tramel

In the article, we exhibit a series of new examples of rigid plane curves, that is, curves, whose collection of singularities determines them almost uniquely up to a projective transformation of the plane.

Algebraic Geometry · Mathematics 2015-06-29 Viktor S. Kulikov , Eugenii Shustin

We investigate complete arcs of degree greater than two, in projective planes over finite fields, arising from the set of rational points of a generalization of the Hermitian curve. The degree of the arcs is closely related to the number of…

Algebraic Geometry · Mathematics 2014-01-16 Herivelto Borges , Beatriz Motta , Fernando Torres

In this article we prove lower and upper bounds for class numbers of algebraic curves defined over finite fields. These bounds turn out to be better than most of the previously known bounds obtained using combinatorics. The methods used in…

Number Theory · Mathematics 2014-12-09 Philippe Lebacque , Alexey Zykin

We investigate the Jacobian decomposition of some algebraic curves over finite fields with genus $4$, $5$ and $10$. As a corollary, explicit equations for curves that are either maximal or minimal over the finite field with $p^2$ elements…

Algebraic Geometry · Mathematics 2019-12-10 Daniele Bartoli , Massimo Giulietti , Mokoto Kawakita , Maria Montanucci

We consider finite-sheeted, regular, possibly branched covering spaces of compact surfaces with boundary and the associated liftable and symmetric mapping class groups. In particular, we classify when either of these subgroups coincides…

Geometric Topology · Mathematics 2020-03-11 Tyrone Ghaswala , Alan McLeay

We present an algorithm for computing curves and families of curves of prescribed degree and geometric genus on real rational surfaces.

Algebraic Geometry · Mathematics 2018-05-11 Niels Lubbes