Attractors and recurrence for dendrite-critical polynomials

We call a rational map f dendrite-critical if all its recurrent critical points either belong to an invariant dendrite D or have minimal limit sets. We prove that if f is a dendrite-critical polynomial, then for any conformal measure μ either for almost every point its limit set coincides with the Julia set of f , or for almost every point its limit set coincides with the limit set of a critical point c of f . Moreover, if μ is non-atomic, then c can be chosen to be recurrent. A corollary is that for a dendritecritical polynomial and a non-atomic conformal measure the limit set of almost every point contains a critical point.  2004 Elsevier Inc. All rights reserved.