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image/svg+xml Jakob Voss, based on art designer at PLoS, modified by Wikipedia users Nina and Beao Closed Access logo, derived from PLoS Open Access logo. This version with transparent background. http://commons.wikimedia.org/wiki/File:Closed_Access_logo_transparent.svg Jakob Voss, based on art designer at PLoS, modified by Wikipedia users Nina and Beao Rendiconti del Circo...arrow_drop_down
image/svg+xml Jakob Voss, based on art designer at PLoS, modified by Wikipedia users Nina and Beao Closed Access logo, derived from PLoS Open Access logo. This version with transparent background. http://commons.wikimedia.org/wiki/File:Closed_Access_logo_transparent.svg Jakob Voss, based on art designer at PLoS, modified by Wikipedia users Nina and Beao
Rendiconti del Circolo Matematico di Palermo (1952 -)
Article . 2002 . Peer-reviewed
License: Springer TDM
Data sources: Crossref
image/svg+xml Jakob Voss, based on art designer at PLoS, modified by Wikipedia users Nina and Beao Closed Access logo, derived from PLoS Open Access logo. This version with transparent background. http://commons.wikimedia.org/wiki/File:Closed_Access_logo_transparent.svg Jakob Voss, based on art designer at PLoS, modified by Wikipedia users Nina and Beao
zbMATH Open
Article . 2002
Data sources: zbMATH Open
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On bianchi identities

On Bianchi identities
Authors: Delanoe, Ph.;

On bianchi identities

Abstract

\textit{G.~Ricci} and his student \textit{T.~Levi-Civita} in their fundamental paper [Math. Ann. 54, 125--201 (1900; JFM 31.0297.01)] laid the foundations to the use of covariant derivatives. Soon after, L.~Bianchi noted that the curvature tensor of a Riemannian metric must satisfy, not only algebraic identities, but also a differential one (often called second Bianchi identity) which he applied to give a new proof of Schur's theorem. \textit{J.~L.~Kazdan} [Proc. Am. Math. Soc. 81, 341--342 (1981; Zbl 0459.53033)] showed that the Bianchi identities can be derived pointwise from the naturality of the full Riemann curvature operator by calculating the derivatives at \(i=0\) of each term of the equation \(\phi^{*}_i(\text{Riem}(g))=\text{Riem}(\phi^{*}_i(g))\), where \(g\) is a Riemannian metric and \(\{\phi_i\}\) is a one-parameter family of diffeomorphisms of \(\mathbb R^n\) with \(\phi_0=\) identity. In this paper, the author extends the Kazdan approach to general linear connections and obtains the first and second Bianchi identities written with curvature and torsion. It is shown that for any linear connection \(\nabla\) with torsion \(T\) and curvature \(R\) the following identities hold: \[ \begin{gathered} (\nabla_UT)(V,W)+\dots=R(U,V)W+T(U,T(V,W))+\dots\tag{B-1}\\ (\nabla_UR)(V,W)+\dots=R(U,T(V,W))+\dots\tag{B-2} \end{gathered} \] where \(\dots\) mean the cyclic sum on vector fields \((U, V, W)\). In this paper, the author extends the Kazdan approach to general linear connections and obtains the first and second Bianchi identities written with curvature and torsion. It is shown that for any linear connection \(\nabla\) with torsion \(T\) and curvature \(R\) the following identities hold: \[ \begin{gathered} (\nabla_UT)(V,W)+\dots=R(U,V)W+T(U,T(V,W))+\dots\tag{B-1}\\ (\nabla_UR)(V,W)+\dots=R(U,T(V,W))+\dots\tag{B-2} \end{gathered} \] where \(\dots\) mean the cyclic sum on vector fields \((U, V, W)\).

Keywords

Differential geometric aspects in vector and tensor analysis, Linear and affine connections

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selected citations
These citations are derived from selected sources.
This is an alternative to the "Influence" indicator, which also reflects the overall/total impact of an article in the research community at large, based on the underlying citation network (diachronically).
BIP!Citations provided by BIP!
popularity
This indicator reflects the "current" impact/attention (the "hype") of an article in the research community at large, based on the underlying citation network.
BIP!Popularity provided by BIP!
influence
This indicator reflects the overall/total impact of an article in the research community at large, based on the underlying citation network (diachronically).
BIP!Influence provided by BIP!
impulse
This indicator reflects the initial momentum of an article directly after its publication, based on the underlying citation network.
BIP!Impulse provided by BIP!
2
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