2026-07-072026-07-07http://salesiana.dossiersoluciones.com/handle/123456789/228718The paper deals with pretangent spaces to general metric spaces. An ltrametricity criterion for pretangent spaces is found and it is closely related to the metric betweenness in the pretangent spaces.21 pagesMetric Geometry54E35Ultrametricity and metric betweenness in tangent spaces to metric spacestext