2026-07-072026-07-07http://salesiana.dossiersoluciones.com/handle/123456789/67455A quite fast proof of the functional equation of the Riemann zeta function. It is a modification of a proof usually overlooked in Titchmarsh's monograph.Expected to be useful for presentation in classNumber TheoryFast proof of functional equation for $ΞΆ(s)$text