  Dirac fermions in the fundamental representation of SU(N) live on a two
dimensional torus flatly embedded in $R^4$. They interact with a four
dimensional SU(N) Yang Mills vector potential preserving a global chiral
symmetry at finite $N$. As the size of the torus in units of
$\frac{1}{\Lambda_{SU(N)}}$ is varied from small to large, the chiral symmetry
gets spontaneously broken in the infinite $N$ limit.
