Singularities in any physical theory are either remarkable indicators of the unknown
underlying fundamental theory, or indicate a change in the description of the physical reality …

Abstract The Nobel Prize winning confirmation in 1998 of the accelerated expansion of our
Universe put into sharp focus the need of a consistent theoretical model to explain the origin …

The strong discrepancy between local and early-time (inverse distance ladder) estimates of
the Hubble constant H 0 could be pointing towards new physics beyond the concordance Λ …

The classical generalization of general relativity is considered as the gravitational alternative
for a unified description of the early-time inflation with late-time cosmic acceleration. The …

Modified gravity theories have received increased attention lately due to combined
motivation coming from high-energy physics, cosmology, and astrophysics. Among …

Mimetic gravity is a Weyl‐symmetric extension of General Relativity, related to the latter by a
singular disformal transformation, wherein the appearance of a dust‐like perfect fluid can …

We explore cosmological constraints on the sum of the three active neutrino masses M ν in
the context of dynamical dark energy (DDE) models with equation of state (EoS) …

We investigate modified theories of gravity in the context of teleparallel geometries. It is well
known that modified gravity models based on the torsion scalar are not invariant under local …

We discuss some main aspects of theories of gravity containing nonlocal terms in view of
cosmological applications. In particular, we consider various extensions of general relativity …

Even if the fundamental action of gravity is local, the corresponding quantum effective action,
that includes the effect of quantum fluctuations, is a nonlocal object. These nonlocalities are …