2026-07-072026-07-07http://salesiana.dossiersoluciones.com/handle/123456789/102286Lectures given at the summer school on Algebraic Groups, Goettingen, June 27 - July 15 2005Notes by Sven-S. Porst; 13 pages Misprints in section 1.5 correctedDifferential GeometryRepresentation Theory53C26; 22E47Lie groups, Nahm's equations and hyperkaehler manifoldstext