A generating partition for the standard map
  A procedure to obtain the symbolic dynamics for conservative dynamical systems is introduced with reference to the standard map in a strongly chaotic regime. The method extends an approach previously developed for highly dissipative systems. It is based on the construction of a generating partition from homoclinic tangencies and fibers of invariant manifolds. It is found that some arbitrariness in the construction of the partition is unavoidable. 
Freddy Christiansen and Antonio Politi, Istituto Nazionale di Ottica,   Firenze, Italy