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f(R) gravity
ID: f-r-gravity
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f(R) gravity
by
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0
Created
2026-09-24
Updated
2026-10-14
An
f
(
R
) theory replaces the
Ricci scalar
in the gravitational
action
by
a
smooth function
f
(
R
)
. Its
metric
field equation
is
f
′
(
R
)
R
ab
−
2
1
f
(
R
)
g
ab
+
(
g
ab
□
−
∇
a
∇
b
)
f
′
(
R
)
=
8
π
T
ab
.
(1)
Total
articles
:
1
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