The two main processes of black hole formation are collapse a matter cloud under its own gravity and accretion onto an already existing gravitating centre. necessary condition for both the to operate is that overall force on collapsing fluid element or test accreting particles attractive. It turns out this not case in general higher dimensions greater than usual four having nonzero angular mome...

We consider the five-dimensional Einstein-Gauss-Bonnet gravity, which can be obtained by means of an apropriate choice coeficients in Lanczos-Lovelock gravity theory. The field equations for Friedmann-Lema\^itre-Robertson-Walker metric are found as well some their solutions. A four-dimensional action is from Gauss-Bonnet using Randall-Sundrum compactification procedure and then it studied impli...

We describe an action principle, within the framework of Eddington gravity, which incorporates matter fields in a simple manner. Interestingly, gravitational field equations derived from this is identical to Einstein's equations, contrast with earlier attempts literature. The cosmological constant arises as integration approach. In fact, derivation demands existence nonzero constant, thereby pr...

The gravitational Lagrangian can be written as a summation of bulk and total derivative term. For some theories gravity such Einstein gravity, or more general Lovelock gravities, there are holographic relations between the term that latter is fully determined by former. However at $D\rightarrow 2\&4$ limit, bulks Gauss-Bonnet become themselves derivatives. Performing Kaluza-Klein reduction on g...