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A fourth-order tensor for expressing the curvature of a Riemann space, vanishing under the condition that space is flat. Also "Riemann–Christoffel curvature tensor".
Early 20th century; earliest use found in Scientific Abstracts. From the name of Georg Friedrich Bernhard Riemann + the name of Erwin Bruno Christoffel, German mathematician + tensor.
Riemann–Christoffel tensor/ˌriːmənˌkrɪstɒfəl ˈtɛnsə/
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