2026-07-072026-07-07http://salesiana.dossiersoluciones.com/handle/123456789/51062Introduction to two dimensional conformal field theory on open and unoriented surfaces. The construction is illustrated in detail on the example of SU(2) WZW models.59 pages, Lectures at the 4th SIGRAV School and 2001 School of Algebraic Geometry and Physics, Como, Italy, May 2001High Energy Physics - Theorytext