2026-07-072026-07-07http://salesiana.dossiersoluciones.com/handle/123456789/51764We study small fluctuations of the stringy wormhole solutions of graviton-dilaton-axion system in arbitrary dimensions. We show under O($d$)-symmetric harmonic perturbation that the Euclidean wormhole solutions are unstable in flat space irrespective of dimensions and in anti de Sitter space of $d=3$.12 pages, no figureHigh Energy Physics - Theorytext