2026-07-072026-07-07http://salesiana.dossiersoluciones.com/handle/123456789/142091Information overload in the modern society calls for highly efficient recommendation algorithms. In this letter we present a novel diffusion based recommendation model, with users' ratings built into a transition matrix. To speed up computation we introduce a Green function method. The numerical tests on a benchmark database show that our prediction is superior to the standard recommendation methods.5 pages, 2 figuresPhysics and SocietyComputers and SocietyInformation RetrievalData Analysis, Statistics and Probabilitytext