2026-07-072026-07-07http://salesiana.dossiersoluciones.com/handle/123456789/55148We construct new maximally symmetric solutions for the metric. We then show that for a string moving in a background consisting of maximally symmetric gravity, dilaton field and second rank antisymmetric tensor field, the O(d) $\otimes$ O(d) transformation on the vacuum solutions, in general, gives inequivalent solutions that are not maximally symmetric.latex, 13 pagesHigh Energy Physics - Theorytext