2026-07-072026-07-07http://salesiana.dossiersoluciones.com/handle/123456789/166443This paper deals with ratio-dependent predator-prey systems with delay. We will investigate under what conditions delay cannot cause instability in higher dimension. We give an example when delay causes instability.32 pages, 15 figuresDynamical SystemsClassical Analysis and ODEsPopulations and Evolution34D20 92B05$n$-dimensional ratio-dependent predator-prey systems with memorytext