作者: Eric Bedford , John Smillie
DOI: 10.1090/S0894-0347-1991-1115786-3
关键词:
摘要: f(x,y)= (y,y ax +c). The diffeomorphisms in this class have complicated dynamics: particular, they periodic points of infinitely many periods and positive topological entropy (see [FM, S]). We can distinguish between these classes by considering the growth degrees iterates diffeomorphism. Define deg(f ) to be maximum coordinate functions. This quantity is not a conjugacy invariant f, hence dynamical invariant. construct invariant, which we call degree, as follows: