Brane intersections, anti-de Sitter space-times and dual superconformal theories

We construct a class of intersecting brane solutions with horizon geometries of the form adS(k) x S-l x S-m x E-n. We describe how all these solutions are connected through the addition of a wave and/or monopoles. All solutions exhibit supersymmetry enhancement near the horizon, Furthermore we argue that string theory on these spaces is dual to specific superconformal field theories in two dimensions whose symmetry algebra in all cases contains the large N = 4 algebra A(gamma). Implications for gauged supergravities are also discussed. (C) 1998 Elsevier Science B.V.