Isaak H. Wolf

collaborators

3 papers

math.CO2026

Some conjectures on $r$ -graphs and equivalences

Yulai Ma, Eckhard Steffen, Isaak H. Wolf +1

An $r$ -regular graph is an $r$ -graph, if every odd set of vertices is connected to its complement by at least $r$ edges. Seymour [On multicolourings of cubic graphs, and conjecture…

math.CO2026

On the existence of factors intersecting sets of cycles in regular graphs

Jan Goedgebeur, Davide Mattiolo, Giuseppe Mazzuoccolo +3

A recent result by KardoÅ¡, MÃ¡ÄajovÃ¡ and Zerafa [J. Comb. Theory, Ser. B. 160 (2023) 1--14] related to the famous Berge-Fulkerson conjecture implies that given an arbitrary set…

math.CO2025

A counterexample to the $S_{10}$ - and the $S_{12}$ -Conjecture

Isaak H. Wolf

For two graphs $G$ and $H$ , a mapping $f : E (G) \to E (H)$ is an $H$ -coloring of $G$ , if it is a proper edge-coloring and for every $v \in V (G)$ there exists a vertex $u \in V(H…

Some conjectures on r-graphs and equivalences

On the existence of factors intersecting sets of cycles in regular graphs

A counterexample to the S10​- and the S12​-Conjecture

Some conjectures on $r$ -graphs and equivalences

A counterexample to the $S_{10}$ - and the $S_{12}$ -Conjecture