Discretizing parametrized systems: the magic of Ditt-invariance Leave a Comment / Uncategorized / By Qiss Carlo Rovelli The Centre de Physique Théorique – UMR 7332 – CNRS and Aix-Marseille Université and Université de Toulon & The University of Western Ontario and Rotman Institute for Philosophy & Perimeter Institute for Theoretical Physics 12/07/11 Preprint Publication