“…This approach was developed in the next few years for smooth discrete-time hyperbolic dynamics by Baladi [3], Gouëzel-Liverani [23]- [24], and Baladi-Tsujii [7]- [8], and more recently for some smooth hyperbolic flows (Butterley-Liverani [12], Tsujii [45] [46]). Except for the Sobolev-Triebel spaces used in [3] (where a strong assumption of regularity of the dynamical foliation was required), it turns out that the Banach spaces appropriate for smooth hyperbolic dynamics are not suitable for systems with discontinuities, because multiplication by the characteristic function of a domain, however nice, is not a bounded operator for the corresponding norms.…”