Equidistribution towards the bifurcation current I : Multipliers and degree d polynomials

In the moduli space of degree d polynomials, the set Per_n(w) of classes [f] for which f admits a cycle of exact period n and multiplier w is known to be an algebraic hypersurface. We prove that, given a complex number w, these hypersurfaces equidistribute towards the bifurcation current as n tends to infinity.