On the Lyapunov spectrum of relative transfer operators
  We analyze the Lyapunov spectrum of the relative Ruelle operator associated with a skew product whose base is an ergodic automorphism and whose fibers are full shifts. We prove that these operators can be approximated in the $C^0$-topology by positive matrices with an associated dominated splitting. 
M\'ario Bessa, Manuel Stadlbauer
math.DS