Dynamical Degree and Arithmetic Degree of Endomorphisms on Product   Varieties
  For a dominant rational self-map on a smooth projective variety defined over a number field, Shu Kawaguchi and Joseph H. Silverman conjectured that the dynamical degree is equal to the arithmetic degree at a rational point whose forward orbit is well-defined and Zariski dense. We give some examples of self-maps on product varieties and rational points on them for which the Kawaguchi-Silverman conjecture holds. 
Kaoru Sano
math.NT math.AG math.DS