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arxiv: 1108.2102 · v1 · pith:JOXXX6QAnew · submitted 2011-08-10 · 🌀 gr-qc · astro-ph.CO

A symmetry of the spatially flat Friedmann equations with barotropic fluid

classification 🌀 gr-qc astro-ph.CO
keywords barotropicequationsflatfriedmannspatiallysymmetrycorrespondingcosmology
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A string-inspired duality symmetry of the spatially flat Friedmann equations of general-relativistic cosmology is discussed and generalized, providing a map between exact solutions corresponding to different values of the barotropic index.

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