Seibergʹs duality from monodromy of conifold singularity

Duality between N=1 supersymmetric gauge theories (Seibergʹs duality) is geometrized. It is shown that Seibergʹs duality corresponds to monodromy of wrapped D5 branes on the homology cycles of a generalized conifold where D3 branes are located. The celebrated Nc̃=Nf−Nc, Nf̃=Nf rule is reproduced and a braid group structure in a sequence of dualities, is found.