- #1

chaksome

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- TL;DR Summary
- covariance covariance

When I come into contact with these two concept in the book of Landau, I gradually know how to use ##A^i or A_i## to simplify the calculation in special relativity.

But I found it hard to give an explicit explanation for them(including gauge matrix) in the aspect of physics.

Could you please give me some illumination? Thanks~

But I found it hard to give an explicit explanation for them(including gauge matrix) in the aspect of physics.

Could you please give me some illumination? Thanks~