2026-07-072026-07-07http://salesiana.dossiersoluciones.com/handle/123456789/23271Using the Theory of Scattering in Restricted Geometries developed by A. Lupu-Sax as a starting point, we present a comprehensive multi-channel theory of atom-atom scattering in tight atom waveguides.Some quite misleading misprints in formulae (5.27), (5.29) were corrected. RevTex, 1 eps figure, lecture course, Les Houches School on "Quantum Gases in Low Dimensions" (April 2003), to be published in Journal de Physique IVOther Condensed Mattertext