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09/28/2021
Generalising the achromatic number to Zaslavsky's colourings of signed graphs
The chromatic number, which refers to the minimum number of colours requ...
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08/24/2021
A proof of the Multiplicative 1-2-3 Conjecture
We prove that the product version of the 1-2-3 Conjecture, raised by Sko...
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09/25/2020
On the signed chromatic number of some classes of graphs
A signed graph (G, σ) is a graph G along with a function σ: E(G) →{+,-}....
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04/20/2020
Further Evidence Towards the Multiplicative 1-2-3 Conjecture
The product version of the 1-2-3 Conjecture, introduced by Skowronek-Kaz...
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11/22/2019
Pushable chromatic number of graphs with degree constraints
Pushable homomorphisms and the pushable chromatic number χ_p of oriented...
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10/12/2018