2026-07-072026-07-07http://salesiana.dossiersoluciones.com/handle/123456789/3273Underlying cosmologies with deceleration parameter, $q_0=-0.51^{+0.03}_{-0.24},$ may be interpreted as having $q_0=-0.55,$ on the basis of weak gravitational lensing effects.Published 2001, Astronomical Society of the Pacific, Conference Series, 237, 363-4Astrophysicstext