activity
20132025
most citedOn a rainbow version of Dirac's theorem

47 citations · 178 across the 44 of their papers we have counts for

collaborators

54 papers

math.CO2025

On the Prague dimension of sparse random graphs

Felix Joos, Letícia Mattos

The Prague dimension of a graph is defined as the minimum number of complete graphs whose direct product contains as an induced subgraph. Introduced in the 1970s by Nešetři…

math.CO2024

Hitting times in the binomial random graph

Bertille Granet, Felix Joos, Jonathan Schrodt

Fix , choose , and consider . For any pair of vertices , we give a simple and prec…

math.CO2023

Counting oriented trees in digraphs with large minimum semidegree

Felix Joos, Jonathan Schrodt

Let be an oriented tree on vertices with maximum degree at most . If is a digraph on vertices with minimum semidegree $δ^0(G)\geq(\frac12+o(1)…

math.CO2023★ 3 cited

Random perfect matchings in regular graphs

Bertille Granet, Felix Joos

We prove that in all regular robust expanders every edge is asymptotically equally likely contained in a uniformly chosen perfect matching . We also show that given any fixe…

math.CO2022

On the -problem of Brown, Erdős and Sós

Stefan Glock, Felix Joos, Jaehoon Kim +3

Let be the maximum number of edges of an -uniform hypergraph on vertices not containing a subgraph with edges and at most vertices. In 1973, Brown,…

math.CO2022

Ramsey theory constructions from hypergraph matchings

Felix Joos, Dhruv Mubayi

We give asymptotically optimal constructions in generalized Ramsey theory using results about conflict-free hypergraph matchings. For example, we present an edge-coloring of $K_{n,…

math.CO2022

Conflict-free hypergraph matchings

Stefan Glock, Felix Joos, Jaehoon Kim +2

A celebrated theorem of Pippenger, and Frankl and Rödl states that every almost-regular, uniform hypergraph with small maximum codegree has an almost-perfect matching…

math.CO2022

Sufficient conditions for perfect mixed tilings

Eoin Hurley, Felix Joos, Richard Lang

We develop a method to study sufficient conditions for perfect mixed tilings. Our framework allows the embedding of bounded degree graphs with components of sublinear order. As…

math.CO2021

Decomposing hypergraphs into cycle factors

Felix Joos, Marcus Kühn, Bjarne Schülke

A famous result by Rödl, Ruciński, and Szemerédi guarantees a (tight) Hamilton cycle in -uniform hypergraphs on vertices with minimum -degree $δ_{k-1}(H)\geq (1/2…

math.CO2021

Fractional cycle decompositions in hypergraphs

Felix Joos, Marcus Kühn

We prove that for any integer and , there is an integer such that any -uniform hypergraph on vertices with minimum codegree at least…

math.CO2020★ 1 cited

Decompositions of quasirandom hypergraphs into hypergraphs of bounded degree

Stefan Ehard, Felix Joos

We prove that any quasirandom uniform hypergraph can be approximately decomposed into any collection of bounded degree hypergraphs with almost as many edges. In fact, our resul…

math.CO2020★ 1 cited

A short proof of the blow-up lemma for approximate decompositions

Stefan Ehard, Felix Joos

Kim, Kühn, Osthus and Tyomkyn (Trans. Amer. Math. Soc. 371 (2019), 4655--4742) greatly extended the well-known blow-up lemma of Komlós, Sárközy and Szemerédi by proving a `blow-up…

math.CO2019★ 6 cited

Counting Hamilton cycles in Dirac hypergraphs

Stefan Glock, Stephen Gould, Felix Joos +2

A tight Hamilton cycle in a -uniform hypergraph (-graph) is a cyclic ordering of the vertices of such that every set of consecutive vertices in the ordering forms…

math.CO2019★ 47 cited

On a rainbow version of Dirac's theorem

Felix Joos, Jaehoon Kim

For a collection of not necessarily distinct graphs on the same vertex set , a graph with vertices in is a -transversal if th…

math.CO2019

Even -cycles have the edge-Erdős-Pósa property

Henning Bruhn

I prove that even -cycles have the edge-Erdős-Pósa property.

math.CO2019

A rainbow blow-up lemma for almost optimally bounded edge-colourings

Stefan Ehard, Stefan Glock, Felix Joos

A subgraph of an edge-coloured graph is called rainbow if all its edges have different colours. We prove a rainbow version of the blow-up lemma of Komlós, Sárközy and Szemerédi tha…

math.CO2019★ 22 cited

Pseudorandom hypergraph matchings

Stefan Ehard, Stefan Glock, Felix Joos

A celebrated theorem of Pippenger states that any almost regular hypergraph with small codegrees has an almost perfect matching. We show that one can find such an almost perfect ma…

math.CO2018

The edge-Erdős-Pósa property

Henning Bruhn, Matthias Heinlein, Felix Joos

Robertson and Seymour proved that the family of all graphs containing a fixed graph as a minor has the Erdős-Pósa property if and only if is planar. We show that this is no…

math.CO2018

-subdivisions have the edge-Erdős-Pósa property

Henning Bruhn, Matthias Heinlein

We prove that every graph contains either edge-disjoint -subdivisions or a set of at most edges such that does not contain any -subdivis…

math.CO2018

Euler tours in hypergraphs

Stefan Glock, Felix Joos, Daniela Kühn +1

We show that a quasirandom -uniform hypergraph has a tight Euler tour subject to the necessary condition that divides all vertex degrees. The case when is complete c…

math.CO2018

Resolution of the Oberwolfach problem

Stefan Glock, Felix Joos, Jaehoon Kim +2

The Oberwolfach problem, posed by Ringel in 1967, asks for a decomposition of into edge-disjoint copies of a given -factor. We show that this can be achieved for all…

math.CO2018★ 1 cited

Erdős-Pósa property for labelled minors: 2-connected minors

Henning Bruhn, Felix Joos, Oliver Schaudt

In the 1960s, Erdős and Pósa proved that there is a packing-covering duality for cycles in graphs. As part of the graph minor project, Robertson and Seymour greatly extended this:…

math.CO2018★ 5 cited

Spanning trees in randomly perturbed graphs

Felix Joos, Jaehoon Kim

A classical result of Komlós, Sárközy and Szemerédi states that every -vertex graph with minimum degree at least contains every -vertex tree with maximum degre…

math.CO2018

Edge correlations in random regular hypergraphs and applications to subgraph testing

Alberto Espuny Díaz, Felix Joos, Daniela Kühn +1

Compared to the classical binomial random (hyper)graph model, the study of random regular hypergraphs is made more challenging due to correlations between the occurrence of differe…