Introducing the Christoffel Symbols | Tensor Calculus
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Christoffel Symbol Transformation Laws | Tensor Calculus
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Einstein's Field Equations – A Simple Derivation
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The Langlands Program - Numberphile
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The Metric Tensor: Introduction and Examples
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Tensor Calculus 15: Geodesics and Christoffel Symbols (extrinsic geometry)
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The Metric Tensor: Definition and Properties
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The Covariant Derivative of a Tensor
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