E. Catsigeras et al., INFINITELY RENORMALIZABLE DIFFEOMORPHISMS OF THE DISK AT THE BOUNDARYOF CHAOS, Proceedings of the American Mathematical Society, 126(1), 1998, pp. 297-304
We show that, among area contracting embeddings of the 2-disk, infinit
ely renormalizable maps with a bounded geometry either have positive t
opological entropy or correspond to a cascade of period doubling.