10 Exact Gravitationally-Conserved Quant
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Newman, E. T.; Penrose, R.
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Article
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1965
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The American Physical Society
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English
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In ordinary electromagnetic theory, total charge remains exactly constant for any system surrounded by source-free space. This is a direct consequence of Maxwell's equations for the free-space region, whereas dipole and higher moments can be carried away by electromagnetic radiation. In gravitationa