Entropy spectrum of Lyapunov exponents for nonhyperbolic step skew-products and elliptic cocycles

Lorenzo J. Díaz, Katrin Gelfert, Michał Rams

We study the fiber Lyapunov exponents of step skew-product maps over a complete shift of $N$, $N\ge 2$, symbols and with $C^1$ diffeomorphisms of the circle as fiber maps. The syste…