AdS/CFT correspondence and coincident D-6-branes
  A relation between confinement and Maldacena conjecture is briefly discussed. The gauge symmetry enhancement for two coincident D-6-branes is analyzed from the viewpoint of the hypermultiplet low-energy effective action given by the N=2 supersymmetric non-linear sigma-model with the Eguchi-Hanson (ALE) target space. 
Sergei V. Ketov (MPI Potsdam, and ITP Hannover)