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Author: WikiMatrix
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English[en]
This formula, too, is readily generalized to curved spacetime by replacing partial derivatives with their curved-manifold counterparts, covariant derivatives studied in differential geometry.
Swedish[sv]
Denna formel är också lätt att generalisera till krökt rumtid genom att ersätta partiella derivator med sina motsvarigheter i krökta mångfalder, kovarianta derivator inom differentialgeometri.