The Four-Dimensionality of Space and the Einstein Tensor

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  • David Lovelock
    Department of Applied Mathematics, University of Waterloo, Waterloo, Ontario, Canada

説明

<jats:p>All tensors of contravariant valency two, which are divergence free on one index and which are concomitants of the metric tensor, together with its first two derivatives, are constructed in the four-dimensional case. The Einstein and metric tensors are the only possibilities.</jats:p>

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