2026-07-072026-07-07http://salesiana.dossiersoluciones.com/handle/123456789/56368This contribution to the proceedings of the 1999 NATO ASI on Quantum Geometry at Akureyri, Iceland, is based on notes of lectures given by A. Strominger. Topics include N-particle conformal quantum mechanics, extended superconformal quantum mechanics and multi-black hole moduli spaces.29 pages AMSLaTeX, using crckapb.sty. 4 figures using epsfig. Minor correctionsHigh Energy Physics - Theorytext