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We give optimal lower bounds for the number of sextactic points on a simple closed curve in the real projective plane. Sextactic points are after inflection points the simplest projectively invariant singularities on such curves. Our method…

Differential Geometry · Mathematics 2007-05-23 Gudlaugur Thorbergsson , Masaaki Umehara

Our goal is to identify the type and number of static equilibrium points of solids arising from fine, equidistant $n$-discretrizations of smooth, convex surfaces. We assume uniform gravity and a frictionless, horizontal, planar support. We…

Differential Geometry · Mathematics 2011-12-02 Gabor Domokos , Zsolt Langi , Timea Szabo

We prove that the number of rational points of bounded height on certain del Pezzo surfaces of degree 1 defined over Q grows linearly, as predicted by Manin's conjecture. Along the way, we investigate the average number of integral points…

Number Theory · Mathematics 2013-08-02 Pierre Le Boudec

We establish asymptotic formulas for the number of integral points of bounded height on partial equivariant compactifications of vector groups.

Number Theory · Mathematics 2019-12-19 Antoine Chambert-Loir , Yuri Tschinkel

In this paper, we study the finiteness problem of torsion points on an elliptic curve whose coordinates satisfy some multiplicative dependence relations. In particular, we prove that on an elliptic curve defined over a number field there…

Number Theory · Mathematics 2020-05-19 Fabrizio Barroero , Min Sha

It is proven that for any topological or analytical types of isolated singular points of plane curves, there exists a non-real irreducible plane algebraic curve of degree $d$ which goes through $d^2$ real distinct points and has imaginary…

alg-geom · Mathematics 2008-02-03 Sergey Finashin , Eugenii Shustin

Let $X$ be an algebraic variety, defined over the rationals. This paper gives upper bounds for the number of rational points on $X$, with height at most $B$, for the case in which $X$ is a curve or a surface. In the latter case one excludes…

Number Theory · Mathematics 2007-05-23 D. R. Heath-Brown , J. -L. Colliot-Thélène

Curves play a fundamental role across computer graphics, physical simulation, and mathematical visualization, yet most tools for curve design do nothing to prevent crossings or self-intersections. This paper develops efficient algorithms…

Graphics · Computer Science 2020-06-16 Christopher Yu , Henrik Schumacher , Keenan Crane

We show that transcendental curves in $\mathbb R^n$ (not necessarily compact) have few rational points of bounded height provided that the curves are well behaved with respect to algebraic sets in a certain sense and can be parametrized by…

Algebraic Geometry · Mathematics 2017-04-18 Georges Comte , Chris Miller

This paper concerns the number of lattice points in the plane which are visible along certain curves to all elements in some set S of lattice points simultaneously. By proposing the concept of level of visibility, we are able to analyze…

Number Theory · Mathematics 2020-05-29 Kui Liu , Xianchang Meng

We derive a new bound for some bilinear sums over points of an elliptic curve over a finite field. We use this bound to improve a series of previous results on various exponential sums and some arithmetic problems involving points on…

Number Theory · Mathematics 2013-08-23 Omran Ahmadi , Igor E. Shparlinski

We study effective versions of unlikely intersections of images of torsion points of elliptic curves on the projective line.

Algebraic Geometry · Mathematics 2017-06-07 Fedor Bogomolov , Hang Fu , Yuri Tschinkel

For a given elliptic curve E in short Weierstrass form, we show that almost all quadratic twists E_D have no integral points, as D ranges over square-free integers ordered by size. Our result is conditional on a weak form of the Hall-Lang…

Number Theory · Mathematics 2024-01-10 Tim Browning , Stephanie Chan

Macaulay dual spaces provide a local description of an affine scheme and give rise to computational machinery that is compatible with the methods of numerical algebraic geometry. We introduce eliminating dual spaces, use them for computing…

Algebraic Geometry · Mathematics 2015-03-09 Robert Krone , Anton Leykin

For every $n\geq 3$, we exhibit infinitely many extremal effective divisors on the moduli space of genus one curves with $n$ marked points.

Algebraic Geometry · Mathematics 2013-04-02 Dawei Chen , Izzet Coskun

Given an iterated function system of affine dilations with fixed points the vertices of a regular polygon, we characterize which points in the limit set lie on the boundary of its convex hull.

Dynamical Systems · Mathematics 2018-11-20 Danny Calegari , Alden Walker

We obtain a coarse relationship between geometric intersection numbers of curves and the sum of their subsurface projection distances with explicit quasi-constants. By using this relationship, we give applications in the studies of the…

Geometric Topology · Mathematics 2017-09-12 Yohsuke Watanabe

We consider families of smooth projective curves of genus 2 with a single point removed and study their integral points. We show that in many such families there is a dense set of fibres for which the integral points can be effectively…

Number Theory · Mathematics 2024-12-31 Pietro Corvaja , Davide Lombardo , Umberto Zannier

We give bounds for exponential sums over curves defined over Galois rings. We first define summation subsets as the images of lifts of points from affine opens of the reduced curve, and we give bounds for the degrees of their coordinate…

Number Theory · Mathematics 2007-05-23 Regis Blache

We give bounds on the number of non-simple closed curves on a negatively curved surface, given upper bounds on both length and self-intersection number. In particular, it was previously known that the number of all closed curves of length…

Geometric Topology · Mathematics 2017-02-21 Jenya Sapir