On the evolution of compact binary black holes
  Based on the consideration of potential energy of the di-black-hole as a
function of mass asymmetry (transfer) collective coordinate, the possibility of
matter transfer between the black holes in a binary system is investigated. The
sensitivity of the calculated results is studied to the value of the total mass
of binary system. The conditions for the merger of two black holes are analyzed
in the context of gravitational wave emission.
