We study higher-dimensional scenarios of massive bigravity, which is a very interesting
extension of nonlinear massive gravity since its reference metric is assumed to be fully …

Assuming static and spherically symmetric spacetimes in the ghost-free bigravity theory, we
find a relativistic star solution, which is very close to that in general relativity. The coupling …

We show that the diffeomorphisms, which preserve the null nature for a generic null metric
very near to the null surface, provide noncommutative Heisenberg algebra. This is the …

We consider the properties of solutions in the bigravity theory for a wide class of models,
which are parametrized by two parameters α 3 and α 4. Assuming that two metric tensors g μ …

There are certain black hole solutions in general relativity which are conformally related to
the stationary solutions in general relativity. It is not obvious that the horizon entropy of these …

The theory of General Relativity GR is considered as 339 the most beautiful theory ever
proposed in the history of mankind Initially the existence of black hole was a mere prediction …

We investigate relativistic star solutions in mass-varying massive gravity (MVMG) with a
diagonal metric. Contrary to the intuition that there is no fundamental difference between …

We have proposed a new ghost-free model with interactions of massive spin-two particles in
Phys. Rev. D 90, 043006 (2014). Although the model is ghost-free on the Minkowski …

In this paper, we propose a toy model of the renormalizable theory describing a massive
spin-two field. Although the model is renormalizable, we show that the model contains …

We consider nonlinear effective actions for a spin-2 field, whose'decoupling'limit gives Fierz–
Pauli action in D dimensional maximally symmetric spacetime. We find, especially, the …