Torons and D-brane Bound States

@inproceedings{Guralnik1997ToronsAD,
  title={Torons and D-brane Bound States},
  author={Zachary Guralnik and Sanjaye Ramgoolam},
  year={1997}
}
We interpret instantons on a torus with twisted boundary conditions, in terms of bound states of branes. The interplay between the SU (N) and U (1) parts of the U (N) theory of N 4-branes allows the construction of a variety of bound states. The SU (N) and U (1) parts can contribute fractional amounts to the total instanton number which is integral. 
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