2026-07-072026-07-07http://salesiana.dossiersoluciones.com/handle/123456789/93595We apply the machinery of projection lattices and von Neumann algebras to analyze the question of how modal interpretations can (and do) circumvent von Neumann's infamous 'no-hidden-variables' theorem.39 Pages, AMS-LaTeX, To Appear in Dennis Dieks and Pieter Vermaas (eds.), The Modal Interpretation of Quantum Mechanics, University of Western Ontario Series in Philosophy of Science, Kluwer Academic Publishers, 1998Quantum PhysicsValuations on Functionally Closed Sets of Quantum Mechanical Observables and Von Neumann's 'No-Hidden-Variables' Theoremtext