Timeline for Contracting the metric tensor with its inverse yields Kronecker delta
Current License: CC BY-SA 4.0
4 events
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| Mar 19 at 22:58 | comment | added | Vincent Thacker | This is incorrect. The basis 1-forms and the basis vectors are not elements of the same vector space. They are elements of $V^*$ and $V$ respectively. So you cannot dot them. Instead it should be written as $e^\mu (e_\nu)$. Any book that uses the dot is mathematically wrong. | |
| Mar 19 at 16:47 | comment | added | Albertus Magnus | Yes, it is good to get familiar with the idea that contraction is the result of a bilinear mapping acting on basis vectors and 1-forms respectively. | |
| Mar 19 at 11:50 | history | edited | Sancol. | CC BY-SA 4.0 |
added 83 characters in body
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| Mar 19 at 11:29 | history | answered | Sancol. | CC BY-SA 4.0 |