xTras
Package Symbol

Metric Variations The GaussBonnet term
Tutorials »
VarL
VarL[
g
[
a
, 
b
]][
L
]
returns
while integrating by parts with respect to the covariant derivative of the metric
g
_{ab}
.
VarL[
g
[
a
, 
b
],
cd
][
L
]
returns
while integrating by parts with respect to the covariant derivative
cd
.
MORE INFORMATION
VarL
throws away total derivatives after partial integration.
The variation can also be taken with respect to the inverse metric.
EXAMPLES
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Basic Examples
(1)
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TUTORIALS
Metric Variations
The GaussBonnet term