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The Strong Ramsey game $\mathcal{R}(B,G)$ is a two player game with players $P_1$ and $P_2$, where $B$ and $G$ are $k$-uniform hypergraphs for some $k \geq 2$. $G$ is always finite, while $B$ may be infinite. $P_1$ and $P_2$ alternately…

组合数学 · 数学 2025-12-04 Nathan Bowler , Henri Ortmüller

We consider the strong Ramsey-type game $\mathcal{R}^{(k)}(\mathcal{H}, \aleph_0)$, played on the edge set of the infinite complete $k$-uniform hypergraph $K^k_{\mathbb{N}}$. Two players, called FP (the first player) and SP (the second…

For two graphs $B$ and $H$ the strong Ramsey game $\mathcal{R}(B,H)$ on the board $B$ and with target $H$ is played as follows. Two players alternately claim edges of $B$. The first player to build a copy of $H$ wins. If none of the players…

组合数学 · 数学 2020-03-11 Stefan David , Ivailo Hartarsky , Marius Tiba

The strong Ramsey game $R(\mathcal{B}, H)$ is a two-player game played on a graph $\mathcal{B}$, referred to as the board, with a target graph $H$. In this game, two players, $P_1$ and $P_2$, alternately claim unclaimed edges of…

组合数学 · 数学 2025-01-28 Jiangdong Ai , Jun Gao , Zixiang Xu , Xin Yan

In a strong game played on the edge set of a graph G there are two players, Red and Blue, alternating turns in claiming previously unclaimed edges of G (with Red playing first). The winner is the first one to claim all the edges of some…

离散数学 · 计算机科学 2015-07-19 Asaf Ferber , Pascal Pfister

Consider the following one-player game played on an initially empty graph with $n$ vertices. At each stage a randomly selected new edge is added and the player must immediately color the edge with one of $r$ available colors. Her objective…

组合数学 · 数学 2016-03-25 Andreas Noever

An ordered graph is a graph with a linear ordering on its vertices. The online Ramsey game for ordered graphs $G$ and $H$ is played on an infinite sequence of vertices; on each turn, Builder draws an edge between two vertices, and Painter…

组合数学 · 数学 2024-03-29 Felix Christian Clemen , Emily Heath , Mikhail Lavrov

Consider the following probabilistic one-player game: The board is a graph with $n$ vertices, which initially contains no edges. In each step, a new edge is drawn uniformly at random from all non-edges and is presented to the player,…

组合数学 · 数学 2009-11-20 Michael Belfrage , Torsten Mütze , Reto Spöhel

We consider combinatorial avoidance and achievement games based on graph Ramsey theory: The players take turns in coloring still uncolored edges of a graph G, each player being assigned a distinct color, choosing one edge per move. In…

计算复杂性 · 计算机科学 2007-05-23 Wolfgang Slany

Motivated by the investigation of sharpness of thresholds for Ramsey properties in random graphs, Friedgut, Kohayakawa, R\"odl, Ruci\'nski and Tetali introduced two variants of a single-player game whose goal is to colour the edges of…

组合数学 · 数学 2023-05-05 Yahav Alon , Patrick Morris , Wojciech Samotij

Given a class $\mathcal{C}$ of graphs and a fixed graph $H$, the online Ramsey game for $H$ on $\mathcal C$ is a game between two players Builder and Painter as follows: an unbounded set of vertices is given as an initial state, and on each…

组合数学 · 数学 2020-01-24 Hojin Choi , Ilkyoo Choi , Jisu Jeong , Sang-il Oum

The online ordered Ramsey game is played between two players, Builder and Painter, on an infinite sequence of vertices with ordered graphs $(G_1,G_2)$, which have linear orderings on their vertices. On each turn, Builder first selects an…

组合数学 · 数学 2024-09-04 Emily Heath , Dylan King , Grace McCourt , Hannah Sheats , Justin Wisby

In this paper we introduce and study the domination game on hypergraphs. This is played on a hypergraph $\mathcal{H}$ by two players, namely Dominator and Staller, who alternately select vertices such that each selected vertex enlarges the…

组合数学 · 数学 2017-10-03 Csilla Bujtás , Balázs Patkós , Zsolt Tuza , Máté vizer

The online Ramsey turnaround game is a game between two players, Builder and Painter, on a board of $n$ vertices using $3$ colors, for a fixed graph $H$ on at most $n$ vertices. The goal of Painter is to force a monochromatic copy of $H$,…

组合数学 · 数学 2025-12-10 Nóra Almási , Maria Axenovich

For any countably infinite graph $G$, Ramsey's theorem guarantees an infinite monochromatic copy of $G$ in any $r$-coloring of the edges of the countably infinite complete graph $K_\mathbb{N}$. Taking this a step further, it is natural to…

组合数学 · 数学 2018-08-16 Louis DeBiasio , Paul McKenney

Consider the following game between two players, Builder and Painter. Builder draws edges one at a time and Painter colours them, in either red or blue, as each appears. Builder's aim is to force Painter to draw a monochromatic copy of a…

组合数学 · 数学 2009-02-11 David Conlon

We introduce a graph Ramsey game called Ramsey, Paper, Scissors. This game has two players, Proposer and Decider. Starting from an empty graph on $n$ vertices, on each turn Proposer proposes a potential edge and Decider simultaneously…

组合数学 · 数学 2020-06-24 Jacob Fox , Xiaoyu He , Yuval Wigderson

A well-known result of R\"odl and Ruci\'nski states that for any graph $H$ there exists a constant $C$ such that if $p \geq C n^{- 1/m_2(H)}$, then the random graph $G_{n,p}$ is a.a.s. $H$-Ramsey, that is, any $2$-colouring of its edges…

组合数学 · 数学 2020-10-29 David Conlon , Shagnik Das , Joonkyung Lee , Tamás Mészáros

An ordered hypergraph is a hypergraph $H$ with a specified linear ordering of the vertices, and the appearance of an ordered hypergraph $G$ in $H$ must respect the specified order on $V(G)$. In on-line Ramsey theory, Builder iteratively…

组合数学 · 数学 2018-07-16 Xavier Perez-Gimenez , Pawel Pralat , Douglas B. West

The $(m,n)$-online Ramsey game is a combinatorial game between two players, Builder and Painter. Starting from an infinite set of isolated vertices, Builder draws an edge on each turn and Painter immediately paints it red or blue. Builder's…

组合数学 · 数学 2018-11-06 David Conlon , Jacob Fox , Andrey Grinshpun , Xiaoyu He
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