activity
20162026
most citedHypergraphs with many extremal configurations

7 citations · 7 across the 10 of their papers we have counts for

collaborators

25 papers

math.CO2026

Regularity method for hypergraphs with -cycle-free links

Ayush Basu, Christian Reiher, Vojtěch Rödl +1

We extend the hypergraph regularity method to sparse -uniform hypergraphs whose vertex links are -free. In other words, we consider hypergraphs that are $K_{1,2,2…

math.CO2026

Canonical Ramsey theorem for graphs with clean intersections

Matías Azócar Carvajal, Ayush Basu, Christian Reiher +3

Extending earlier results of Nešetřil and Rödl [Selective graphs and hypergraphs, Ann. Discrete Math. 3 (1978), 181--189], we show that for every ordered graph there exist an o…

math.CO2026

Linearly distributive coherence in the absence of units

Max Demirdilek, Christian Reiher, Christoph Schweigert

Coherence in a monoidal category asserts that all morphisms built from structural isomorphisms with a fixed source and target coincide. These structural isomorphisms include, in pa…

math.CO2026

Large sum-free sets in finite vector spaces II

Christian Reiher, Sofia Zotova

Answering a question of Leo Versteegen, we prove that for every sum-free set with is either contained in the union of t…

math.CO2026

The complete picture for clique factors in randomly perturbed graphs

Sylwia Antoniuk, Nina Kamčev, Christian Reiher +1

A randomly perturbed graph is obtained by taking a deterministic -vertex graph with minimum degree and adding the edges of th…

math.CO2025

Unavoidable subgraphs in Ramsey graphs

Christian Reiher, Vojtěch Rödl, Mathias Schacht

We study subgraphs that appear in large Ramsey graphs for a given graph . The recent girth Ramsey theorem of the first two authors asserts that there are Ramsey graphs such that…