| Other
issues |
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| � | There is a
horizon problem.� That is, there is a |
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| horizon scale
which is the maximum distance |
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| over which
information can be communicated |
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| at cosmic
epoch t.� This must be taken into |
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| account when
growing perturbations. |
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| � | Also relevant
is the Jean�s mass, the mass |
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| contained
within region of diameter the Jean�s |
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| length (here
assuming only baryons): |
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