2026-07-072026-07-07http://salesiana.dossiersoluciones.com/handle/123456789/194097Variation of constants in the very early universe can generate inflation. We consider a scenario where the strong coupling constant was changing in time and where the gluon condensate underwent a phase transition ending the inflation.12 pages, 1 figure, accepted for publication in International Journal of Modern Physics DAstrophysicsGeneral Relativity and Quantum CosmologyHigh Energy Physics - Phenomenologytext