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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