  In this paper, we prove the equidistribution of periodic points of a regular
polynomial automorphism f : A^n -> A^n defined over a number field K: let f be
a regular polynomial automorphism defined over a number field K and let v be a
prime place. Then, there exists an f-invariant probability measure mu_{f,v}$ on
Berkovich space of P^n(C_v) such that the set of periodic points of f is
equidistributed with respect to mu_{f,v}. We will prove it by equidistribution
of small points for strongly regular pair of polynomial maps.
