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Logarithmic growth of matter perturbations during radiation domination
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Physics
Branch of physics
Cosmology
Linear cosmological density perturbation
Density contrast
Linear growth factor
2026-09-29
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When
matter
self-
gravity
is negligible during
radiation domination
,
a
∝
t
1/2
and
δ
¨
+
2
H
δ
˙
=
0
gives
δ
=
C
1
+
C
2
lo
g
a
.
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(7)
Linear growth factor
Density contrast
Linear cosmological density perturbation
Cosmology
Branch of physics
Physics
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Past exam of the mathematics course of the University of Cambridge
/
2015
/
iii
/
Paper 53
/
4
/
ii
/
Solution
Past exam of the mathematics course of the University of Cambridge
/
2020
/
ii
/
Paper 3
/
14D
/
iii
/
Solution
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