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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…

组合数学 · 数学 2015-12-07 Misha Rudnev

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 $D$…

代数几何 · 数学 2015-06-03 Micha Sharir , Noam Solomon

We extend (and somewhat simplify) the algebraic proof technique of Guth and Katz \cite{GK}, to obtain several sharp bounds on the number of incidences between lines and points in three dimensions. Specifically, we show: (i) The maximum…

计算几何 · 计算机科学 2009-05-12 György Elekes , Haim Kaplan , Micha Sharir

We bound the number of incidences between points and spheres in finite vector spaces by bounding the sum of the number of points in the pairwise intersections of the spheres. We obtain new incidence bounds that are interesting when the…

组合数学 · 数学 2025-10-01 Doowon Koh , Ben Lund , Chuandong Xu , Semin Yoo

The point-plane incidence theorem states that the number of incidences between $n$ points and $m\geq n$ planes in the projective three-space over a field $F$, is $$O\left(m\sqrt{n}+ m k\right),$$ where $k$ is the maximum number of collinear…

组合数学 · 数学 2018-06-12 Misha Rudnev

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…

组合数学 · 数学 2017-08-16 Sophie Stevens , Frank de Zeeuw

We give a fairly elementary and simple proof that shows that the number of incidences between $m$ points and $n$ lines in ${\mathbb R}^3$, so that no plane contains more than $s$ lines, is $$ O\left(m^{1/2}n^{3/4}+ m^{2/3}n^{1/3}s^{1/3} + m…

组合数学 · 数学 2015-01-13 Micha Sharir , Noam Solomon

Let $P$ be a set of $m$ points and $L$ a set of $n$ lines in $\mathbb R^4$, such that the points of $P$ lie on an algebraic three-dimensional surface of degree $D$ that does not contain hyperplane or quadric components, and no 2-flat…

组合数学 · 数学 2016-09-29 Micha Sharir , Noam Solomon

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…

组合数学 · 数学 2017-05-01 Micha Sharir , Noam Solomon

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…

组合数学 · 数学 2023-01-13 Ali Mohammadi , Thang Pham , Audie Warren

We study the probability for a random line to intersect a given plane curve, defined over a finite field, in a given number of points defined over the same field. In particular, we focus on the limits of these probabilities under successive…

组合数学 · 数学 2021-04-30 Mehdi Makhul , Josef Schicho , Matteo Gallet

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…

组合数学 · 数学 2020-07-09 Micha Sharir , Noam Solomon

We use methods from spectral graph theory to obtain bounds on the number of incidences between $k$-planes and $h$-planes in $\mathbb{F}_q^d$ which generalize a recent result given by Bennett, Iosevich, and Pakianathan (2014). More…

组合数学 · 数学 2015-10-14 Nguyen Duy Phuong , Thang Pham , Le Anh Vinh

In this paper we establish an improved bound for the number of incidences between a set $P$ of $m$ points and a set $H$ of $n$ planes in $\mathbb R^3$, provided that the points lie on a two-dimensional nonlinear irreducible algebraic…

组合数学 · 数学 2017-05-31 Micha Sharir , Noam Solomon

Incidence problems between geometric objects is a key area of focus in the field of discrete geometry. Among them, the study of incidence problems over finite fields have received a considerable amount of attention in recent years. In this…

组合数学 · 数学 2025-05-01 Xiangliang Kong , Itzhak Tamo

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…

组合数学 · 数学 2015-03-31 Hong Wang , Ben Yang , Ruixiang Zhang

We first describe a reduction from the problem of lower-bounding the number of distinct distances determined by a set $S$ of $s$ points in the plane to an incidence problem between points and a certain class of helices (or parabolas) in…

计算几何 · 计算机科学 2010-05-07 György Elekes , Micha Sharir

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…

组合数学 · 数学 2018-07-10 Jordan S. Ellenberg , Jozsef Solymosi , Joshua Zahl

We discuss a unified approach to a class of geometric combinatorics incidence problems in $2D$, of the Erd\"os distance type. The goal is obtaining the second moment estimate, that is given a finite point set $S$ and a function $f$ on…

度量几何 · 数学 2016-09-06 Misha Rudnev , J. M. Selig

The famous Szemer\'{e}di-Trotter theorem states that any arrangement of $n$ points and $n$ lines in the plane determines $O(n^{4/3})$ incidences, and this bound is tight. In this paper, we prove the following Tur\'an-type result for…

组合数学 · 数学 2020-06-23 Mozhgan Mirzaei , Andrew Suk
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