2026-07-072026-07-07http://salesiana.dossiersoluciones.com/handle/123456789/152066Comparisons on $L^{n\over 2}$-norms of scalar curvatures between Riemannian metrics and standard metrics are obtained. The metrics are restricted to conformal classes or under certain curvature conditions.26 pages, LaTex formatDifferential Geometrytext