2026-07-072026-07-07http://salesiana.dossiersoluciones.com/handle/123456789/111692In this note under a crucial technical assumption we derive a differential equality of the Yamabe constant $\mathcal{Y} (g (t))$ where $g (t)$ is a solution of the Ricci flow on a closed manifold.6 pagesDifferential Geometry53C44text