Three Men Discuss Relativity (Classic Reprint) - Softcover

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Excerpt from Three Men Discuss Relativity

Newton's abstractions, force, mass, and so on, we are not familiar with such abstractions as a non-euclidean four-dimensional continuum. Also Einstein's abstractions were introduced for the same reason that Newton's were introduced, namely, that they are susceptible of mathemati cal treatment. For physics tries to describe phenomena only in terms of entities that can be mathematically defined. Hence, in discussing Einstein's entities, I have done so with reference to their mathematical aspects. The reader must be resigned to the fact that it is only in virtue of their mathematical aspects that these entities have any raison d'étre at [all. Nevertheless, although I am forced to talk about mathematical entities, I do not perform any mathematical cal culations. It would be necessary to do so if I wanted to show how the theory of relativity de velops from its assumptions. But my object is not to present the theory of relativity, but to show what the theory is about.

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