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arxiv: astro-ph/9907080 · v1 · submitted 1999-07-07 · 🌌 astro-ph · gr-qc

A conserved variable in the perturbed hydrodynamic world model

classification 🌌 astro-ph gr-qc
keywords conservedvariableconsideringconstantcosmologicalcurvatureequationexactly
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We introduce a scalar-type perturbation variable $\Phi$ which is conserved in the large-scale limit considering general sign of three-space curvature ($K$), the cosmological constant ($\Lambda$), and time varying equation of state. In a pressureless medium $\Phi$ is {\it exactly conserved} in all scales.

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