2026-07-072026-07-07http://salesiana.dossiersoluciones.com/handle/123456789/228408It is well known that projective measurement will not decrease the von Neumann entropy of a quantum state. In this paper, it is shown that projective measurement will not decrease the quantum Tsallis entropy of a quantum state, either. Using a similar analysis, it can be shown that projective measurement will not decrease the quantum unified (r, s)-entropy in general.7 pagesData Analysis, Statistics and ProbabilityComputational Physicstext