2026-07-072026-07-07http://salesiana.dossiersoluciones.com/handle/123456789/147502Contents I. Introduction II. Fermi Liquids III. Renormalization group for interacting fermions IV. Luttinger liquids V. Transport in a Luttinger liquid VI. The Bethe ansatz: a pedestrian introduction VII. Conclusion and outlook1994 Les Houches lecture notes, 59 pages, RexTeX 3.0, uuencoded, together with postscript figures, needs epsf, you want to compile houches_send.tex (small corrections to original submission)Condensed Mattertext