Singularities for fluids with p=ω equation of state

Abstract
The structure of singularities is discussed for some exact solutions of Einstein equations for irrotational perfect fluids with equation of state pressure equal to energy density, p=ω. It is found that all singularities studied are velocity−dominated of the semi−Kasner class. It is also found that data on the singularity are not enough to generate space−time for all times.

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