2026-07-072026-07-07http://salesiana.dossiersoluciones.com/handle/123456789/11741I report on a systematic derivation of the phenomenological ``adhesion approximation'' from gravitational instability together with a brief evaluation of the related status of analytical modeling of large-scale structure.LaTeX2e 2 pages; uses sprocl.sty, to appear in 12th Potsdam cosmology workshopAstrophysicstext