2026-07-072026-07-07http://salesiana.dossiersoluciones.com/handle/123456789/230147This article is a draft of a book chapter of the book entitled "Quantum Percolation and Breakdown", to appear 2008.Invited book chapter, "Quantum Percolation and Breakdown", Lecture Notes in Physics (Springer, Heidelberg, 2008). Also contains longer version of proof of main statement of quant-ph/0611140Quantum Physicstext