Republication of: The physical reality of some normal spaces of Bianchi
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This is an English translation of the first of two papers by Tullio Levi-Civita, first published in 1917 and 1919. The papers are remarkable as being among the earliest in which exact solutions of Einstein’s equations were derived. Of the two solutions presented, the first (republished as this Golden Oldie) is better known today as the Bertotti-Robinson solution, and the second one (republished as an accompanying Golden Oldie) is the gravitational field of an infinite cylinder. The papers have been selected by the Editors of General Relativity and Gravitation for republication in the Golden Oldies series of the journal. This republication is accompanied by an editorial note written by Malcolm MacCallum, and by a brief biography of the author, compiled from internet sources by Andrzej Krasiński.
KeywordsNormal Space Covariant Derivative Constant Curvature Principal Curvature Physical Reality
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