On five-dimensional massive (bi-)gravity
  Main results of our recent investigations on five-dimensional scenarios of
massive (bi-)gravity will be summarized in this article. In particular, we will
show how to construct higher dimensional massive graviton terms from the
characteristic equation of square matrix, which is a consequence of the
Cayley-Hamilton theorem. Then, we will show whether massive graviton terms of
five-dimensional massive (bi-)gravity behave as effective cosmological
constants for a number of physical metrics compatible with fiducial ones such
as the Friedmann-Lemaitre-Robertson-Walker, Bianchi type I, and
Schwarzschild-Tangherlini metrics. Finally, we will show the corresponding
cosmological solutions for the five-dimensional massive (bi-)gravity.
