2026-07-072026-07-07http://salesiana.dossiersoluciones.com/handle/123456789/35834It is shown that a transition from a multidimensional cosmological model with one internal space of the dimension d_1 to the effective tree-level bosonic string corresponds to an infinite number of the internal dimensions: d_1 -> infinity.latex, to appear in Gravitation and CosmologyGeneral Relativity and Quantum Cosmologytext