2026-07-072026-07-07http://salesiana.dossiersoluciones.com/handle/123456789/58252In Noncommutative Geometry, as in quantum theory, classically real variables are assumed to correspond to self-adjoint operators. We consider the relaxation of the requirement of self-adjointness to mere symmetry for operators $X_i$ which encode space-time information.8 pages, LaTeX, to appear in Extended Proceedings I.S.I. Guccia Workshop 98, Nova 1999Mathematical Physicstext