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math.CO2026

Maker Breaker Games on a Budget

Sebastian Lüderssen, Fabien Nießen, Silas Rathke

The Maker Breaker Triangle Game involves two players, Maker and Breaker, who alternately claim 1 and edges of , respectively. Maker's goal is to claim all three edges of a…

math.CO2026

No extremal square-free words over alphabets of size at least 5

Eng Keat Hng, Silas Rathke

A word over an alphabet contains a square if it has a subword of the form where is a word. A word is \emph{extremal square-free} if it does not contain a s…

math.CO2026

The maximum diameter of -dimensional simplicial complexes

Stefan Glock, Olaf Parczyk, Silas Rathke +1

For every fixed dimension and sufficiently large , we determine the maximum possible diameter of a strongly connected -dimensional simplicial complex on vertices. Thi…

math.CO2025

Spanning Components and Surfaces Under Minimum Vertex Degree

Jack Allsop, Ander Lamaison, Richard Lang +1

We study minimum vertex-degree conditions in 3-uniform hypergraphs for (tight) spanning components and (combinatorial) surfaces. Our main results show that a 3-uniform hypergraph $…

math.CO2025

The maximum diameter of 2-dimensional simplicial complexes

Olaf Parczyk, Silas Rathke, Tibor Szabó

We study a problem of Santos about the largest possible diameter of a -dimensional (abstract) simplicial complex on vertices. For dimension 2, we determine the exact value o…

math.CO2024

On the chromatic number of powers of subdivisions of graphs

Michael Anastos, Simona Boyadzhiyska, Silas Rathke +1

For a given graph , we define its \emph{th subdivision} as the graph obtained from by replacing every edge by a path of length . We also define the \emph{th p…