List questions from index-notation

Published on 14 Oct 2018 - 13:16

466

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How does index notation work in Hermitian spaces?

Published on 14 Oct 2018 - 13:24

882

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What is a tensor with two upper or lower indices?

Published on 16 Oct 2018 - 12:46

369

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Need help understading prime notation for vector/time series

Published on 17 Oct 2018 - 15:47

817

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Show that the laplacian of the curl of A equals the curl of the laplacian of A. $\nabla^2(\nabla\times A) = \nabla \times(\nabla^2A)$

Published on 29 Oct 2018 - 21:56

5.9k

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divergence of dyadic product using index notation

Published on 30 Oct 2018 - 5:33

154

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Validity of Index Notation

Published on 25 Mar 2026 - 2:02

45

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Prove equality with cross products using Einstein notation

Published on 31 Oct 2018 - 16:17

194

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Ordinary Least Squared derivation using Index Notation

Published on 02 Nov 2018 - 17:51

32

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Show that $\nabla^{2}\left ( x_{i}x_{j}r^{n} \right ) = 2\delta _{ij}r^{n}+n\left ( n+5 \right )x_{i}x_{j}r^{n-2}$

Published on 03 Nov 2018 - 9:17

314

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Transformation rule in differential geometry

Published on 25 Mar 2026 - 4:37

45

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Expressing the coordinate dependent and indepent forms of the $(0,1)$ tensor in different coordinate systems

Published on 25 Mar 2026 - 4:40

60

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Changing index of summation

Published on 11 Nov 2018 - 22:52

1.2k

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How to prove Penrose "Bianchi symmetry" with non-zero torsion tensor using abstract indexing?

Published on 25 Mar 2026 - 6:05

875

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Using diagonality in Einstein notation

Published on 21 Nov 2018 - 11:24

List Question

Matrix and two vectors product

How does index notation work in Hermitian spaces?

What is a tensor with two upper or lower indices?

Need help understading prime notation for vector/time series

Show that the laplacian of the curl of A equals the curl of the laplacian of A. $\nabla^2(\nabla\times A) = \nabla \times(\nabla^2A)$

divergence of dyadic product using index notation

Validity of Index Notation

Prove equality with cross products using Einstein notation

Ordinary Least Squared derivation using Index Notation

Show that $\nabla^{2}\left ( x_{i}x_{j}r^{n} \right ) = 2\delta _{ij}r^{n}+n\left ( n+5 \right )x_{i}x_{j}r^{n-2}$

Transformation rule in differential geometry

Expressing the coordinate dependent and indepent forms of the $(0,1)$ tensor in different coordinate systems

Changing index of summation

How to prove Penrose "Bianchi symmetry" with non-zero torsion tensor using abstract indexing?

Using diagonality in Einstein notation

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