最終更新日:2022/12/24
Furthermore, we note that ∂𝜇∂𝜇=𝜂∂𝜇∂_𝜈=-∇²=□, which is known as the d'Alembertian, is invariant under Lorentz transformations.
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Furthermore, we note that ∂𝜇∂𝜇=𝜂∂𝜇∂_𝜈=-∇²=□, which is known as the d'Alembertian, is invariant under Lorentz transformations.