abstract: We will talk about an approximation of the activity current Tc in the parameter space of a holomorphic family f of rational functions having a marked critical point c by parameters for which c is periodic under f, i.e., is a superattracting periodic point. This partly generalizes a Dujardin- Favre theorem for rational functions having preperiodic points, and refines a Bassanelli-Berteloot theorem on a similar approximation of the bifurcation current Tf of the holomorphic family f.
Okuyama