2026-07-072026-07-07http://salesiana.dossiersoluciones.com/handle/123456789/104670We prove that 3-dimensional Schrodinger operator with slowly decaying sparse potential has an a.c. spectrum that fills positive half-line. A new kind of WKB asymptotics for Green's function is found. The absense of positive eigenvalues is established as well.Mathematical PhysicsAnalysis of PDEstext