2026-07-072026-07-07http://salesiana.dossiersoluciones.com/handle/123456789/150187Two cycles on a projective variety over an algebraically closed field are shown to be rationally equivalent if and only if their difference equals a difference of complete intersections of a certain kind. Some of Bloch's conjectures for zero-cycles on surfaces can be restated more geometrically, which leads to several questions.20 pages TeXAlgebraic Geometrytext