2026-07-072026-07-07http://salesiana.dossiersoluciones.com/handle/123456789/90070Some properties of the function$ ψ(s)=\sum\limits_{k=-\infty}^\infty {% \exp (-\frac{k^2}{s^2}})$ are studied, and an interpolation formula is given.2 pages, 2figuresQuantum Physicstext