Non-negatively curved metrics on $S^2\times S^2$ admitting Killing fields

2026-07-072026-07-07http://salesiana.dossiersoluciones.com/handle/123456789/120062%auto-ignore This paper has been withdrawn by the author, due to a crucial error.Differential GeometryMetric Geometry53C20; 53C21Non-negatively curved metrics on $S^2\times S^2$ admitting Killing fieldstext