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We prove new bounds on the number of incidences between points and higher degree algebraic curves. The key ingredient is an improved initial bound, which is valid for all fields. Then we apply the polynomial method to obtain global bounds…

Combinatorics · Mathematics 2015-03-31 Hong Wang , Ben Yang , Ruixiang Zhang

We study a wide spectrum of incidence problems involving points and curves or points and surfaces in $\mathbb R^3$. The current (and in fact the only viable) approach to such problems, pioneered by Guth and Katz [2010,2015], requires a…

Combinatorics · Mathematics 2017-05-01 Micha Sharir , Noam Solomon

We study incidence problems involving points and curves in $R^3$. The current (and in fact only viable) approach to such problems, pioneered by Guth and Katz, requires a variety of tools from algebraic geometry, most notably (i) the…

Combinatorics · Mathematics 2020-07-09 Micha Sharir , Noam Solomon

We prove a new upper bound for the number of incidences between points and lines in a plane over an arbitrary field $\mathbb{F}$, a problem first considered by Bourgain, Katz and Tao. Specifically, we show that $m$ points and $n$ lines in…

Combinatorics · Mathematics 2017-08-16 Sophie Stevens , Frank de Zeeuw

In this ote, which has been absorbed by arXiv1702.01003, we combine a recent point-line incidence bound of Stevens and de Zeeuw with an older lemma of Bourgain, Katz and Tao to bound the number of collinear triples and quadruples in a…

Combinatorics · Mathematics 2017-02-10 Giorgis Petridis

We establish new bounds on the number of tangencies and orthogonal intersections determined by an arrangement of curves. First, given a set of $n$ algebraic plane curves, we show that there are $O(n^{3/2})$ points where two or more curves…

Combinatorics · Mathematics 2018-07-10 Jordan S. Ellenberg , Jozsef Solymosi , Joshua Zahl

We introduce a new approach for studying incidences with non-algebraic curves in the plane. This approach is based on the concepts of Pfaffian curves and Pfaffian functions, as defined by Khovanskii. We derive incidence bounds for curves…

Combinatorics · Mathematics 2023-11-10 Alexander Balsera

We prove new incidence bounds between a plane point set, which is a Cartesian product, and a set of translates $H$ of the hyperbola $xy=\lambda\neq 0$, over a field of asymptotically large positive characteristic $p$. They improve recent…

Combinatorics · Mathematics 2021-04-22 Misha Rudnev , James Wheeler

We prove several bounds on the number of incidences between two sets of multivariate polynomials of bounded degree over finite fields. From these results, we deduce bounds on incidences between points and multivariate polynomials, extending…

Combinatorics · Mathematics 2025-09-23 Chong Shangguan , Yulin Yang , Tao Zhang

We present a direct and fairly simple proof of the following incidence bound: Let $P$ be a set of $m$ points and $L$ a set of $n$ lines in ${\mathbb R}^d$, for $d\ge 3$, which lie in a common algebraic two-dimensional surface of degree $D$…

Algebraic Geometry · Mathematics 2015-06-03 Micha Sharir , Noam Solomon

Determining the crossing numbers of Cartesian products of small graphs with arbitrarily large paths has been an ongoing topic of research since the 1970s. Doing so requires the establishment of coincident upper and lower bounds; the former…

Combinatorics · Mathematics 2024-09-12 Zayed Asiri , Ryan Burdett , Markus Chimani , Michael Haythorpe , Alex Newcombe , Mirko H. Wagner

We present a polynomial partitioning theorem for finite sets of points in the real locus of an irreducible complex algebraic variety of codimension at most two. This result generalizes the polynomial partitioning theorem on the Euclidean…

Algebraic Geometry · Mathematics 2015-09-22 Saugata Basu , Martin Sombra

In this paper, we prove the first incidence bound for points and conics over prime fields. As applications, we prove new results on expansion of bivariate polynomial images and on certain variations of distinct distances problems. These…

Combinatorics · Mathematics 2023-01-13 Ali Mohammadi , Thang Pham , Audie Warren

In this paper we study Cartesian products of graphs and their divisorial gonality, which is a tropical version of the gonality of an algebraic curve. We present an upper bound on the gonality of the Cartesian product of any two graphs, and…

Combinatorics · Mathematics 2019-09-24 Ivan Aidun , Ralph Morrison

A uniform bound of intersection multiplicities of curves and divisors on abelian varieties is proved by algebraic geometric methods. It extends and improves a result obtained by A. Buium with a different method based on Kolchin's…

Algebraic Geometry · Mathematics 2007-05-23 Junjiro Noguchi , Joerg Winkelmann

Given a set of points $P$ and a set of regions $\mathcal{O}$, an incidence is a pair $(p,o ) \in P \times \mathcal{O}$ such that $p \in o$. We obtain a number of new results on a classical question in combinatorial geometry: What is the…

Computational Geometry · Computer Science 2023-02-27 Timothy M. Chan , Sariel Har-Peled

In this paper we introduce a unified approach to deal with incidence problems between points and varieties over finite fields. More precisely, we prove that the number of incidences $I(\mathcal{P}, \mathcal{V})$ between a set $\mathcal{P}$…

Combinatorics · Mathematics 2016-01-05 Nguyen Duy Phuong , Thang Pham , Nguyen Minh Sang , Claudiu Valculescu , Le Anh Vinh

We prove that the number of incidences between $m$ points and $n$ bounded-degree curves with $k$ degrees of freedom in ${\mathbb R}^d$ is \[ I(m,n) =O\left(m^{\frac{k}{dk-d+1}+\varepsilon}n^{\frac{dk-d}{dk-d+1}}+ \sum_{j=2}^{d-1}…

Combinatorics · Mathematics 2015-12-29 Micha Sharir , Adam Sheffer , Noam Solomon

We study incidences between points and algebraic curves in three dimensions, taken from a family $C$ of curves that have almost two degrees of freedom, meaning that every pair of curves intersect in $O(1)$ points, for any pair of points…

Computational Geometry · Computer Science 2020-06-24 Micha Sharir , Noam Solomon , Oleg Zlydenko

We prove an incidence theorem for points and planes in the projective space $\mathbb P^3$ over any field $\mathbb F$, whose characteristic $p\neq 2.$ An incidence is viewed as an intersection along a line of a pair of two-planes from two…

Combinatorics · Mathematics 2015-12-07 Misha Rudnev
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