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We construct type II A brane configuration of $N=(4,4)$ supersymmetric two
dimensional gauge theory with gauge group $U(1)$ and $N_f$ hypermultiplets in
the fundamental representation. By lifting to M-theory (strong coupling), we
can see the origin of the R-symmetry enhancement of the Coulomb branch. One
can also find two theories which become equivalent at strong coupling.
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