2026-07-072026-07-07http://salesiana.dossiersoluciones.com/handle/123456789/26938Lecture notes from the Jerusalem Winter School on Theoretical Physics "Correlated Electron Systems", Dec. 1991 -- Jan. 1992. Contains a review of recent and not so recent results in the theory of correlated fermions in one dimension.43 pages, PostScript file (because of figures in the text)Condensed Mattertext