Branched derivatives

Academic Article


  • We investigate the local behaviour of branched covering maps at their branching points and introduce a notion of a branched derivative, similar to a derivative for diffeomorphisms. Then, under an additional assumption that the map is locally area preserving, we look at the dynamics in a neighbourhood of a periodic branching point. The two stable (hyperbolic) cases are similar to the usual picture at a hyperbolic periodic point, with a few important differences. In particular, in the case analogous to saddle behaviour, one gets one expanding direction and a Cantor set of contracting directions. © 2005 IOP Publishing Ltd and London Mathematical Society.
  • Authors

    Published In

  • Nonlinearity  Journal
  • Digital Object Identifier (doi)

    Author List

  • Blokh A; Misiurewicz M
  • Start Page

  • 703
  • End Page

  • 715
  • Volume

  • 18
  • Issue

  • 2