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Monadically stable and monadically NIP classes of structures were initially studied in the context of model theory and defined in logical terms. They have recently attracted attention in the area of structural graph theory, as they…

计算机科学中的逻辑 · 计算机科学 2023-11-28 Jan Dreier , Nikolas Mählmann , Sebastian Siebertz , Szymon Toruńczyk

Edge polytopes is a class of interesting polytope with rich algebraic and combinatorial properties, which was introduced by Ohsugi and Hibi. In this papar, we follow a previous study on cutting edge polytopes by Hibi, Li and Zhang. Instead…

组合数学 · 数学 2014-12-17 Atsushi Funato , Nan Li , Akihiro Shikama

We give inductive constructions of independent graphs that contain implied nonedges but do not contain any non-trivial rigid subgraphs, or \emph{nucleations}: some of the constructions and proofs apply to 3-dimensional abstract rigidity…

组合数学 · 数学 2025-08-19 Jialong Cheng , Meera Sitharam , Ileana Streinu , William Sims

These notes concern aspects of various graphs whose vertex set is a group $G$ and whose edges reflect group structure in some way (so that they are invariant under the action of the automorphism group of $G$). The graphs I will discuss are…

群论 · 数学 2021-03-29 Peter J. Cameron

A polytope is called indecomposable if it cannot be expressed nontrivially as a Minkowski sum of other polytopes. Since Gale introduced the concept in 1954, several increasingly strong criteria have been developed to characterize…

组合数学 · 数学 2026-05-27 Arnau Padrol , Germain Poullot

We bound the volume of thick embeddings of finite graphs into the Heisenberg group, as well as the volume of coarse wirings of finite graphs into groups with polynomial growth. This work follows the work of Kolmogorov-Brazdin, Gromov-Guth…

度量几何 · 数学 2024-10-29 Or Kalifa

For a $k$-uniform hypergraph $F$ let $\textrm{ex}(n,F)$ be the maximum number of edges of a $k$-uniform $n$-vertex hypergraph $H$ which contains no copy of $F$. Determining or estimating $\textrm{ex}(n,F)$ is a classical and central problem…

组合数学 · 数学 2020-12-18 Christian Reiher

Graphs on integer points of polytopes whose edges come from a set of allowed differences are studied. It is shown that any simple graph can be embedded in that way. The minimal dimension of such a representation is the fiber dimension of…

组合数学 · 数学 2016-01-19 Tobias Windisch

We define notions of local topological convergence and local geometric convergence for embedded graphs in $\mathbb{R}^n,$ and study their properties. The former is related to Benjamini-Schramm convergence, and the latter to weak convergence…

概率论 · 数学 2017-06-28 Benjamin Schweinhart

Averbouch, Godlin and Makowsky define the edge elimination polynomial of a graph by a recurrence relation with respect to the deletion, contraction and extraction of an edge. It generalizes some well-known graph polynomials such as the…

组合数学 · 数学 2014-06-13 Martin Trinks

The edge-reconstruction number of graph $G$, denoted $ern(G)$,is the size of the smallest multiset of edge-deleted, unlabeled subgraphs of $G$, from which the structure of $G$ can be uniquely determined. That there was some connection…

组合数学 · 数学 2015-03-04 Michael S. Ross

Let $D$ be a weighted oriented graph with the underlying graph $G$ and $I(D), I(G) $ be the edge ideals corresponding to $D$ and $G$ respectively. We show that the regularity of edge ideal of a certain class of weighted oriented graph…

组合数学 · 数学 2022-04-12 Mousumi Mandal , Dipak Kumar Pradhan

Rigidity is the property of a structure that does not flex. It is well studied in discrete geometry and mechanics, and has applications in material science, engineering and biological sciences. A bar-and-joint framework is a pair $(G,p)$ of…

组合数学 · 数学 2021-03-02 Sebastian M. Cioabă , Sean Dewar , Xiaofeng Gu

Extremal graph theory studies the maximum or minimum number of subgraphs isomorphic to a prescribed graph under given constraints. \textit{Localization} has recently emerged as a framework that refines such problems by assigning extremal…

组合数学 · 数学 2026-03-10 Rajat Adak , L. Sunil Chandran

We give the first non-trivial decremental dynamic embedding of a weighted, undirected graph $G$ into $\ell_p$ space. Given a weighted graph $G$ undergoing a sequence of edge weight increases, the goal of this problem is to maintain a…

数据结构与算法 · 计算机科学 2024-08-15 Kiarash Banihashem , MohammadTaghi Hajiaghayi , Dariusz R. Kowalski , Jan Olkowski , Max Springer

We prove essentially tight lower bounds, conditionally to the Exponential Time Hypothesis, for two fundamental but seemingly very different cutting problems on surface-embedded graphs: the Shortest Cut Graph problem and the Multiway Cut…

计算复杂性 · 计算机科学 2021-02-18 Vincent Cohen-Addad , Éric Colin de Verdière , Daniel Marx , Arnaud de Mesmay

Let $X$ be a (repetitive) infinite connected simple graph with a finite upper bound $\Delta$ on the vertex degrees. The main theorem states that $X$ admits a (repetitive) limit aperiodic vertex coloring by $\Delta$ colors. This refines a…

度量几何 · 数学 2020-03-05 Jesús A. Álvarez López , Ramón Barral Lijó

A very popular class of models for networks posits that each node is represented by a point in a continuous latent space, and that the probability of an edge between nodes is a decreasing function of the distance between them in this latent…

统计理论 · 数学 2025-01-07 Cosma Rohilla Shalizi , Dena Marie Asta

Graph embeddings, wherein the nodes of the graph are represented by points in a continuous space, are used in a broad range of Graph ML applications. The quality of such embeddings crucially depends on whether the geometry of the space…

机器学习 · 统计学 2022-02-03 Francesco Di Giovanni , Giulia Luise , Michael Bronstein

The fourth listed author and Hans Parshall (\cite{IosevichParshall}) proved that if $E \subset {\mathbb F}_q^d$, $d \ge 2$, and $G$ is a connected graph on $k+1$ vertices such that the largest degree of any vertex is $m$, then if $|E| \ge C…

组合数学 · 数学 2023-08-21 Paige Bright , Xinyu Fang , Barrett Heritage , Alex Iosevich , Maxwell Sun
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