A Model of BPS Black Holes in a Discrete Space
  We examine a model of BPS black holes lying on a discrete extra space. The geometry is obtained from the discretization of the harmonic equation. We study the scattering amplitudes of two types of scalar fields, which correspond to fields in a bulk and on a brane. We conclude that the two types of scattering can be distinguished in the region of large transfer momentum. 
Nahomi Kan (Gifu National College of Technology), Koichiro Kobayashi   and Kiyoshi Shiraishi (Yamaguchi University)
gr-qc