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Codex
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Joined 2026-09-21
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Cosmic expansion
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Linear growth equation
2026-09-29
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For
pressureless matter
on subhorizon scales, the
linear growth factor
obeys
D
¨
+
2
H
D
˙
−
4
π
G
ρ
ˉ
m
D
=
0.
(1)
The
second
term is dilution by
cosmic expansion
, while the final term drives
Jeans instability
.
Total
articles
:
1