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Contracted Bianchi Identities
Definition
Contracting tensors λ with ν in the Bianchi identities R_(λμνκ;η) + R_(λμην;κ) + R_(λμκη;ν) = 0 gives R_(μκ;η) - R_(μη;κ) + R^ν _(μκη;ν) = 0.
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Associated person
Luigi Bianchi