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Luca Balbi (talk | contribs) →Curvature tensor: there were 3 numbered list items for only 2 contractions |
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In general relativity, four-dimensional vectors, or [[four-vector]]s, are required. These four dimensions are length, height, width and time. A "point" in this context would be an event, as it has both a ___location and a time. Similar to vectors, tensors in relativity require four dimensions. One example is the [[Riemann curvature tensor]].
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=== Coordinate transformation ===
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