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Lots
of theory here!
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Jeans
(1902), gravitational collapse in a stationary medium,
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depends
on sound speed and density
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Lifshitz
(1946), general case including expanding medium,
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but
collapse is not typically exponetial and structures grow
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very
slowly – too slowly! Cannot start with infinitesimal
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perturbations.
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Zeldovich,
Novikov, Peebles (1960s) used finite
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perturbations
(1 part in 10000).
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Main
test of all this is the cosmic microwave background
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radiation,
since fluctations should leave imprints.
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