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Cosmological Euler equation in synchronous gauge
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Physics
Branch of physics
Cosmology
Linear cosmological perturbation theory
Scalar cosmological perturbation
Synchronous gauge in cosmology
Created
2026-09-24
Updated
2026-09-24
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For
scalar
perturbations of
a
generic fluid in cosmic
time
,
momentum
conservation in
synchronous gauge in cosmology
gives
δ
P
+
∇
2
π
S
+
∂
t
[(
ρ
ˉ
+
P
ˉ
)
δ
u
]
+
3
H
(
ρ
ˉ
+
P
ˉ
)
δ
u
=
0.
(1)
Ancestors
(7)
Synchronous gauge in cosmology
Scalar cosmological perturbation
Linear cosmological perturbation theory
Cosmology
Branch of physics
Physics
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Past exam of the mathematics course of the University of Cambridge
/
2026
/
iii
/
Paper 310
/
3
/
e
/
Solution
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