2026-07-072026-07-07http://salesiana.dossiersoluciones.com/handle/123456789/131313We begin with an interpretation of the L1-distance between two power spectral densities and then, following an analogous rationale, we develop a natural metric for quantifying distance between respective covariance matrices.11 pages, no figuresOptimization and ControlStatistics Theory47N70Distances between time-series and their autocorrelation statisticstext