Abstract
MR. MAIR states clearly in his preface the scope of his book, which deals essentially with the elementary geometry of a four-dimensional continuum of space and time, the existence of straight lines being assumed. His aim is to prepare the ground for an understanding of relativity geometry rather than to treat his subject as a special case of general manifold geometry. The terminology is evidently chosen from this point of view, and the distinction between ‘time-like’ and ‘space-like’ vectors is made early in the book and used throughout.
Fourfold Geometry: being the Elementary Geometry of the Four-Dimensional World.
By David Beveridge Mair. Pp. viii + 183. (London: Methuen and Co., Ltd., 1926.) 8s. 6d. net.
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Fourfold Geometry: being the Elementary Geometry of the Four-Dimensional World . Nature 118, 368 (1926). https://doi.org/10.1038/118368a0
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DOI: https://doi.org/10.1038/118368a0