2026-07-072026-07-07http://salesiana.dossiersoluciones.com/handle/123456789/149359The characteristic novel features of strongly coupled gravity at the special values ($C_L=7, 13, 19$) are reviewed in a simple manner using pictures as much as possible. (Notes of lectures at the 1995 Cargese Meeting Low dimensional applications of quantum field theory)16 pages, latex, 28 figures, uuencoded, replacement for Latex problemsHigh Energy Physics - Theorytext