Buildings, Extensions, and Volume Growth Entropy
  Let F be a non-Archimedean local field and let E be a finite extension of F. Let G be a split semisimple F group. We discuss how to compare volumes on the Bruhat-Tits buildings B_E and B_F of G(E) and G(F) respectively. 
Jayadev S. Athreya, Anish Ghosh, and Amritanshu Prasad
math.GT math.DS math.NT