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2021-08-13 13:35:20 +0200 | marked best answer | Contraction of Levi-Civita Symbols I would like to calculate various contractions of the Levi-Civita symbol using SageMath. As far as i know, there is no direct implementation of the ordinary symbol, so I followed another post and just used the Euclidean space: I tested some generic contractions which all seemed to work fine, however, once I started to change the contraction order, things became odd. While correctly returns (2nd or works just fine. Why does it seem like Sage does not care about the order if I contract all indices at once but does if I do it one after another? |
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2021-08-10 11:37:26 +0200 | commented answer | Contraction of Levi-Civita Symbols Thanks for opening the ticket. Indeed, for tensor fields it does seem to work which explains why taking the trace return |
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2021-08-09 17:32:14 +0200 | asked a question | Contraction of Levi-Civita Symbols Contraction of Levi-Civita Symbols I would like to calculate various contractions of the Levi-Civita symbol using SageMa |