title: Exact two-dimensional superconformal R symmetry and c extremization.
abstract: We uncover a general principle dubbed c extremization, which determines the exact R symmetry of a two-dimensional unitary superconformal field theory with N=(0,2) supersymmetry. To illustrate its utility, we study superconformal theories obtained by twisted compactifications of four-dimensional N=4 super-Yang-Mills theory on Riemann surfaces and construct their gravity duals.
authors: Simons Center for Geometry and Physics, Stony Brook University, Stony Brook, New York 11794-3636, USA.
authors: Francesco
authors: F
authors: Benini
authors: Nikolay
authors: N
authors: Bobev