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04/10/2023
Digraph Colouring and Arc-Connectivity
The dichromatic number χ⃗(D) of a digraph D is the minimum size of a par...
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12/18/2022
Problems, proofs, and disproofs on the inversion number
The inversion of a set X of vertices in a digraph D consists in reversin...
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12/05/2022
(P6, triangle)-free digraphs have bounded dichromatic number
The dichromatic number of an oriented graph is the minimum size of a par...
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02/27/2022
Heroes in oriented complete multipartite graphs
The dichromatic number of a digraph is the minimum size of a partition o...
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02/18/2022
Heroes in orientations of chordal graphs
We characterize all digraphs H such that orientations of chordal graphs ...
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01/27/2022
Vizing's and Shannon's Theorems for defective edge colouring
We call a multigraph (k,d)-edge colourable if its edge set can be partit...
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09/03/2021
