| Thermal
History of the Universe |
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| • | Radiation-Dominated
Universes |
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| – | So, the
dynamics of radiation dominated |
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| models, R goes
as t 1/2 depends only on the |
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| total inertial
mass density (massless and |
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| relativistic
components). |
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| – | and neglecting
the constant curvature time |
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| at early
epochs: |
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