2026-07-072026-07-07http://salesiana.dossiersoluciones.com/handle/123456789/170437This survey of recent developments in cloaking and transformation optics is an expanded version of the lecture by Gunther Uhlmann at the 2008 Annual Meeting of the American Mathematical Society.68 pages, 12 figures. To appear in the Bulletin of the AMSMathematical PhysicsAnalysis of PDEsOpticstext