Ergodic Theory and Dynamical Systems

Research Article

Non-continuous weakly expanding skew-products of quadratic maps with two positive Lyapunov exponents


a1 Royal Institute of Technology (KTH), Department of Mathematics, S-100 44 Stockholm, Sweden (email:


We study an extension of the Viana map where the base dynamics is a discontinuous expanding map, and prove the existence of two positive Lyapunov exponents.

(Received October 31 2005)

(Revised May 07 2007)