Mention897639

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so:text That the existence of these motions is a desideratum, if not... a necessity, for a geometry applicable to physical space, has been forcefully argued on a priori grounds by von Helmholtz, Whitehead, Russell and others; for only in a homogeneous and isotropic space can the traditional concept of a rigid body be maintained. (en)
so:isPartOf https://en.wikiquote.org/wiki/Howard_P._Robertson
so:description Geometry as a Branch of Physics (1949) (en)
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