On the Hawking wormhole horizon entropy.
Perturbations à symétrie sphérique de la métrique d'un univers en expansion, II
Quantization of midisuperspace models.
Quantum information from graviton-matter gas.
Regular and chaotic regimes in scalar field cosmology.
Relativity and irreversibility.
Remarks on the ambiguity of distance determination in Friedmann's cosmological model
Representation of the Lorentz transformations in 6-dimensional space-time
Scalar perturbations in f(R) cosmologies in the late Universe
Standard approach in cosmology is hydrodynamical approach, when galaxies are smoothed distributions of matter. Then we model the Universe as a fluid. But we know, that the Universe has a discrete structure on scales 150 - 370 MPc. Therefore we must use the generalized mechanical approach, when is the mass concentrated in points. Methods of computations are then different. We focus on -theories of gravity and we work in the cell of uniformity in the late Universe. We do the scalar perturbations...
Shifted Riccati procedure: application to conformal barotropic FRW cosmologies.
Some Friedmann cosmological solutions in the scale covariant theory of gravitation.
Special Functions and Pathways for Problems in Astrophysics: An Essay in Honor of A.M. Mathai
The paper provides a review of A.M. Mathai's applications of the theory of special functions, particularly generalized hypergeometric functions, to problems in stellar physics and formation of structure in the Universe and to questions related to reaction, diffusion, and reaction-diffusion models. The essay also highlights Mathai's recent work on entropic, distributional, and differential pathways to basic concepts in statistical mechanics, making use of his earlier research results in information...
The cosmic microwave background.
The cosmological constant.
The nonlinear future stability of the FLRW family of solutions to the irrotational Euler-Einstein system with a positive cosmological constant
In this article, we study small perturbations of the family of Friedmann-Lemaître-Robertson-Walker cosmological background solutions to the coupled Euler-Einstein system with a positive cosmological constant in spacetime dimensions. The background solutions model an initially uniform quiet fluid of positive energy density evolving in a spacetime undergoing exponentially accelerated expansion. Our nonlinear analysis shows that under the equation of state , the background metric + fluid solutions...
Unified field – the universal blueprint?
Varying constants, gravitation and cosmology.