List questions from general-relativity

Published on 26 Mar 2021 - 4:41

172

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What is the einstein notation for the hessian matrix

Published on 30 Mar 2021 - 11:30

35

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Coordinate free version of Kerr-Schild perturbation

Published on 30 Mar 2021 - 20:25

3k

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What is the conceptual idea behind raising and lowering indices?

Published on 23 Feb 2026 - 10:04

815

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Why is this a first integral? - particle near Schwarzschild black hole

Published on 25 Mar 2026 - 16:13

217

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Is it special for a Lagrangian to equal its first integral?

Published on 25 Mar 2026 - 17:52

142

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Understanding why $\nabla_i\nabla^j\nabla_jA^i = \nabla^j\nabla_i\nabla_jA^i - R_i^s\nabla_sA^i +R_s^j\nabla_jA^s $

Published on 26 Mar 2026 - 9:50

193

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Contracting a symmetric tensor on another tensor

Published on 21 Apr 2021 - 14:06

29

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How to visualise a geodesic for a particular manifold

Published on 23 Apr 2021 - 0:38

24

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Raised non-Lorentz index notation

Published on 08 May 2021 - 17:57

358

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Converting from Spherical metric tensor to Cylindrical metric tensor

Published on 27 Mar 2026 - 13:18

320

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Conserved quantity from the metric $ds^2=-X^2dT^2+dX^2$

Published on 17 May 2021 - 21:55

226

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Equation of null geodesics

Published on 20 May 2021 - 0:19

683

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Is the covariant derivative of the inverse metric zero?

Published on 25 Mar 2026 - 23:38

335

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Dimensionality and determinant of the first fundamental form

Published on 26 May 2021 - 0:15

List Question

About a metric's symmetric properties...

What is the einstein notation for the hessian matrix

Coordinate free version of Kerr-Schild perturbation

What is the conceptual idea behind raising and lowering indices?

Why is this a first integral? - particle near Schwarzschild black hole

Is it special for a Lagrangian to equal its first integral?

Understanding why $\nabla_i\nabla^j\nabla_jA^i = \nabla^j\nabla_i\nabla_jA^i - R_i^s\nabla_sA^i +R_s^j\nabla_jA^s $

Contracting a symmetric tensor on another tensor

How to visualise a geodesic for a particular manifold

Raised non-Lorentz index notation

Converting from Spherical metric tensor to Cylindrical metric tensor

Conserved quantity from the metric $ds^2=-X^2dT^2+dX^2$

Equation of null geodesics

Is the covariant derivative of the inverse metric zero?

Dimensionality and determinant of the first fundamental form

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