© 1991 by London Mathematical Society
Hausdorff and Conformal Measures on Julia Sets with a Rationally Indifferent Periodic Point
ski
Institut für Mathematische Stochastik Lotzestraße 13, 3400 Göttingen, Germany
Instytut Matematyki, N. Copernicus University ul. Chopina 12/18, 87-100 Toru
, Poland
We show that the Hausdorff dimension
of a non-hyperbolic Julia set J(T) without critical points can be expressed by the smallest zero of the pressure function t
P(T, t log |T'|). This result is similar to the Bowen-Manning-McCluskey formula. The Hausdorff dimension is also shown to be the smallest exponent t
R for which a t-conformal measure in the sense of Sullivan exists. We also prove uniqueness properties of t-conformal measures, and we prove the absolute continuity of the Hausdorff measure H
with respect to any
-conformal measure.