2026-07-072026-07-07http://salesiana.dossiersoluciones.com/handle/123456789/38561We summarize some of the difficulties that confront lattice calculations of non-leptonic kaon decay matrix elements. We review some of the methods that have been proposed to overcome these difficulties, and discuss the importance of one-loop ChPT in this respect, including the role of O(p^4) operators.6 pages, contribution to Kaon 2001High Energy Physics - LatticeHigh Energy Physics - Phenomenologytext