Lizwi Posted September 7, 2021 Share Posted September 7, 2021 What type of mathematica is this on the picture. When I start to study relativity, it appears and I don't understand it. Link to comment Share on other sites More sharing options...
mathematic Posted September 7, 2021 Share Posted September 7, 2021 Try math Forum. Link to comment Share on other sites More sharing options...
Lizwi Posted September 8, 2021 Author Share Posted September 8, 2021 What type of mathematics must I do to understand this mathematics in the picture below? Link to comment Share on other sites More sharing options...
Markus Hanke Posted September 8, 2021 Share Posted September 8, 2021 It is tensor calculus, and differential geometry. Perhaps it would be better to start with Special Relativity first, which is simpler, and work your way up from there. 1 Link to comment Share on other sites More sharing options...
studiot Posted September 8, 2021 Share Posted September 8, 2021 21 hours ago, Lizwi said: What type of mathematica is this on the picture. When I start to study relativity, it appears and I don't understand it. Look here https://www.grc.nasa.gov/www/k-12/Numbers/Math/documents/Tensors_TM2002211716.pdf Link to comment Share on other sites More sharing options...
joigus Posted September 8, 2021 Share Posted September 8, 2021 Tensor analysis. A very complete classic book of which affordable paperback editions exist: https://www.amazon.es/Tensors-Differential-Variational-Principles-Mathematics/dp/0486658406 1 Link to comment Share on other sites More sharing options...
joigus Posted September 8, 2021 Share Posted September 8, 2021 1 hour ago, Markus Hanke said: It is tensor calculus, and differential geometry. Perhaps it would be better to start with Special Relativity first, which is simpler, and work your way up from there. Ignore my answer on thread "Four-vector" and follow this excellent tip by Markus. Studiot's recommendation looks fine. It's just that I'm not familiar with it. The simpler toys to play with are called "affine tensors". They do not depend on the point of space you're considering. Special Relativity is the place to start --> nothing depends on the location. Then make tensors depend on the point of space --> tensor analysis. You will become familiar with a monster called "the connection", and "the Riemann tensor" and everything else come from that "connection". Link to comment Share on other sites More sharing options...
swansont Posted September 8, 2021 Share Posted September 8, 2021 ! Moderator Note Threads merged. One per topic, please Link to comment Share on other sites More sharing options...
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