2026-07-072026-07-07http://salesiana.dossiersoluciones.com/handle/123456789/55585Various string theory realizations of three-dimensional gauge theories relate them to gravitational instantons, Nahm equations and monopoles. We use this correspondence to model self-dual gravitational instantons of $D_k$-type as moduli spaces of singular monopoles, find their twistor spaces and metrics.4pp. Talk given at 6th International Symposium on Particles, Strings and Cosmology (PASCOS 98), Boston, MA, 22-27 Mar 1998High Energy Physics - Theorytext