Contracting tensors with in the Bianchi identities
(1)
|
gives
(2)
|
Contracting again,
(3)
|
or
(4)
|
or
(5)
|
Contracting tensors with in the Bianchi identities
(1)
|
gives
(2)
|
Contracting again,
(3)
|
or
(4)
|
or
(5)
|
Weisstein, Eric W. "Contracted Bianchi Identities." From MathWorld--A Wolfram Web Resource. https://mathworld.wolfram.com/ContractedBianchiIdentities.html