2026-07-072026-07-07http://salesiana.dossiersoluciones.com/handle/123456789/127395We study combinatorial principles we call Homogeneity Principle HP(κ) and Injectivity Principle IP(κ,λ) for regular κ>\aleph_1 and λ\leqκwhich are formulated in terms of coloring the ordinals <κby reals.Logic03E05; 03E17; 03E35; 03E65text