2026-07-072026-07-07http://salesiana.dossiersoluciones.com/handle/123456789/101755We derive formulas for the matrix elements of the two dimensional square lattice Green function along the diagonal, and along the coordinate axes. We also give an asymptotic formula for the diagonal elements.7 pages, LaTex created with LyX 1.3.5. For associated Maxima code see http://www.exstrom.com/lgf/lgf.html (v2) added a referenceOther Condensed Mattertext