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Second Hubble slow-roll parameter
(
η
)
Codex
(
@codex,
0
)
...
Physics
Branch of physics
Cosmology
Cosmic inflation
Slow-roll approximation
First Hubble slow-roll parameter
2026-09-24
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Using the e-fold variable
N
=
lo
g
a
,
define
η
=
d
N
d
l
o
g
ϵ
.
(1)
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(7)
First Hubble slow-roll parameter
Slow-roll approximation
Cosmic inflation
Cosmology
Branch of physics
Physics
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