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    • Bijan Modak

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    • Volume 23 Issue 6 December 1984 pp 809-814 General Relativity

      A neutrino universe with viscosity

      Bijan Modak

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      A solution of the Einstein field equation corresponding to a distribution of fluid with equation of stateρ = 3p but with a nonvanishing shear viscosity is presented. The solution is spherical symmetric and the flow lines are geodetic.

    • Volume 26 Issue 6 June 1986 pp 499-504

      Physical approach to cosmological homogeneity II

      Bijan Modak

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      The question of cosmological homogeneity was earlier studied from the physical point of view, the consideration being limited to the case where the velocity vector is orthogonal to the pressure constant hypersurfaces. The present paper extends the investigation where this condition may not hold true. However the proof of homogeneity requires the introduction of some additional assumptions.

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      Posted on July 25, 2019

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