Schedule
String Junctions and the BPS Spectrum of N=2 Theories
Savdeep Sethi
**
I review how the BPS spectrum on a D3-brane probe in F theory is realized in
spacetime in
terms of multi-string configurations. As a sample application, I show how the
complete BPS
spectrum of four-dimensional N=2 SU(2) Yang-Mills can be determined at any point
on the
Coulomb branch using this stringy picture.
**

hep-th/9803142,hep-th/9802033,hep-th/9801205
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