• Reza Tavakol

      Articles written in Pramana – Journal of Physics

    • Workshop IV — Cosmology-theoretical models/alternative scenarios: A report

      Asit Banerjee Reza Tavakol

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      Due to its subject matter, this workshop included a number of rather disjointed contributions in a number of areas, including exact solutions, mathematical cosmology and alternative theories. We shall therefore give a brief summary of each talk in this section in alphabetical order.

    • Density contrast indicators in cosmological dust models

      Filipe C Mena Reza Tavakol

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      We discuss ways of quantifying structuration in relativistic cosmological settings, by employing a family of covariant density constrast indicators. We study the evolution of these indicators with time in the context of inhomogeneous Szekeres models. We find that different observers (having either different spatial locations or different indicators) see different evolutions for the density contrast, which may or may not be monotonically increasing with time. We also find that monotonicity seems to be related to the initial conditions of the model, which may be of potential interest in connection with debates regarding gravitational entropy and the arrow of time.

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