  In this contribution to the review on localization in gauge theories we
investigate the matrix models derived from localizing N=1 super Yang-Mills on
S^5. We consider the large-N limit and attempt to solve the matrix model by a
saddle-point approximation. In general it is not possible to find an analytic
solution, but at the weak and the strong limits of the 't Hooft coupling there
are dramatic simplifications that allows us to extract most of the interesting
information. At weak coupling we show that the matrix model is close to the
Gaussian matrix model and that the free-energy scales as N^2. At strong
coupling we show that if the theory contains one adjoint hypermultiplet then
the free-energy scales as N^3. We also find the expectation value of a
supersymmetric Wilson loop that wraps the equator. We demonstrate how to
extract the effective couplings and reproduce results of Seiberg. Finally, we
compare to results for the six-dimensional (2,0) theory derived using the
AdS/CFT correspondence. We show that by choosing the hypermultiplet mass such
that the supersymmetry is enhanced to N=2, the Wilson loop result matches the
analogous calculation using AdS/CFT. The free-energies differ by a rational
fraction.
