Symmetrization of Rational Maps: Arithmetic Properties and Families of   Latt\`es Maps of $\mathbb P^k$
  In this paper we study properties of endomorphisms of $\p^k$ using a symmetric product construction $(\p^1)^k/\mathfrak{S}_k \cong \p^k$. Symmetric products have been used to produce examples of endomorphisms of $\p^k$ with certain characteristics, $k\geq2$. In the present note, we discuss the use of these maps to enlighten stability phenomena in parameter spaces. In particular, we study $k$-deep post-critically finite maps and characterize families of Latt\`es maps. 
Thomas Gauthier, Benjamin Hutz, and Scott Kaschner
math.DS