2026-07-072026-07-07http://salesiana.dossiersoluciones.com/handle/123456789/153693We review several fermionic-type character formulae for the characters of the integrable highest weight modules of sl(n)^ at level l=1, and explain how they arise from a spinon basis for these modules. We also review how the Yangian Y(sl(n)) acts on the integrable (sl(n)^)_1 modules and we decompose the characters with respect to this Y(sl(n)) action.to appear in ``Geometric Analysis and Lie Theory in Mathematics and Physics'', Lecture Notes Series of the Australian Mathematical Society; 34 pages plain TeX with amssym.defQuantum Algebra17B67, 17B68, 81R10text