Canonical formalism of bigravity
arXiv:1312.5516
Abstract
We construct the Hamiltonian formalism of bigravity for the potential of a general form. We find conditions on this potential and prove that under these conditions the formalism is equivalent to the one constructed with the celebrated dRGT-potential.
5 pages, talk given at "Black and Dark Topics of Modern Cosmology and Astrophysics", Dubna, September 15-22, 2013