Intersection Rules and Open Branes

Abstract

A general rule determining how extremal branes can intersect in a configuration with zero binding energy is presented. It is derived in a model independent way and without explicit use of supersymmetry, solving a set of classical equations of motion. When specializing to M and type II theories, it is shown that some intersection rules can be consistently interpreted as boundary rules for open branes ending on other branes.Comment: 12 pages, Latex, uses crckapb.sty. To appear in the proceedings of the Cargese '97 summer schoo