EN
An additive hereditary property of graphs is a class of simple graphs which is closed under unions, subgraphs and isomorphisms. Let 𝓟 and 𝓠 be hereditary properties of graphs. The generalized edge-chromatic number $ρ'_{𝓠}(𝓟)$ is defined as the least integer n such that 𝓟 ⊆ n𝓠. We investigate the generalized edge-chromatic numbers of the properties → H, 𝓘ₖ, 𝓞ₖ, 𝓦*ₖ, 𝓢ₖ and 𝓓ₖ.