A number of challenges to the standard Λ CDM model have been emerging during the past
few years as the accuracy of cosmological observations improves. In this review we discuss …

The simplest ΛCDM model provides a good fit to a large span of cosmological data but
harbors large areas of phenomenology and ignorance. With the improvement of the number …

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 …

We compile a complete collection of reliable Hubble parameter H (z) data to redshift z≤
2.36 and use them with the Gaussian Process method to determine continuous H (z) …

Constraining the dark energy deceleration parameter is one of the fascinating topics in the
recent cosmological paradigm. This work aims to reconstruct the dark energy using …

In this article we compare a variety of well-known dynamical dark energy models using the
cosmic microwave background measurements from the 2018 Planck legacy and 2015 …

Knowing the late time evolution of the Universe and finding out the causes for this evolution
are the important challenges of modern cosmology. In this work, we adopt a model …

In this work, we study different types of dark energy (DE) models in the framework of the
cosmographic approach, with emphasis on the running vacuum models (RVMs). We assess …

We propose a novel deep learning tool in order to study the evolution of dark energy
models. The aim is to combine two architectures: the Recurrent Neural Networks (RNN) and …

Using mock data for the Hubble diagrams of type Ia supernovae (SNIa) and quasars (QSOs)
generated based on the standard model of cosmology, and using the least-squares method …