Extended Theories of Gravity can be considered as a new paradigm to cure shortcomings of
General Relativity at infrared and ultraviolet scales. They are an approach that, by …

The current understanding of some important nonlinear collective processes in quantum
plasmas with degenerate electrons is presented. After reviewing the basic properties of …

Beyond Einstein's Gravity is a graduate level introduction to extended theories of gravity and
cosmology, including variational principles, the weak-field limit, gravitational waves …

The equation of motion for massive particles in f (R) modified theories of gravity is derived.
By considering an explicit coupling between an arbitrary function of the scalar curvature, R …

Astrophysical observations are pointing out huge amounts of “dark matter” and “dark energy”
needed to explain the observed large scale structure and cosmic dynamics. The emerging …

A covariant scalar–tensor–vector gravity theory is developed which allows the gravitational
constant G, a vector field coupling ω and the vector field mass μ to vary with space and time …

Efforts to place limits on deviations from canonical formulations of electromagnetism and
gravity have probed length scales increasing dramatically over time. Historically, these …

For the last 100 years, General Relativity (GR) has taken over the gravitational theory mantle
held by Newtonian Gravity for the previous 200 years. This article reviews the status of GR in …

Higher-order theories of gravity have recently attracted a lot of interest as alternative
candidates to explain the observed cosmic acceleration without the need of introducing any …

We investigate the hydrostatic equilibrium of stellar structure by taking into account the
modified<? format?> Lané-Emden equation coming out from f (R) gravity. Such an equation …