2026-07-072026-07-07http://salesiana.dossiersoluciones.com/handle/123456789/93222The reduction paradigm of quantum interferometry is reanalyzed. In contrast to widespread opinion it is shown to be amenable to straightforward mathematical treatment within ``every-users'' simple-minded single particle quantum mechanics (without reduction postulate or the like), exploiting only its probabilistic content.2 pages A4, LaTeXQuantum Physicstext