Electronic Journal of Differential Equations, Vol. 2012 (2012), No. 60, pp. 1-19. Title: Harnack inequalities, a priori estimates, and sufficient statistics for nonlinear elliptic systems in quantum mechanics Author: Carlos C. Aranda (Blue Angel Navire research laboratory, QC, Canada) Abstract: In this article, we consider systems of nonlinear elliptic problems and their relations with minimal sufficient statistics, which is a fundamental tool in classics statistics. This allows us to introduce new experimental tools in quantum physics. Submitted August 10, 211. Published April 12, 2012. Math Subject Classifications: 35A20, 35B05, 35B40. Key Words: A priori bounds; integral relation method; quantum mechanics; celestial mechanics.