Einstein wrote about this book in the following terms:

"The present book is intended to those readers who, from a general scientific and philosophical point of view, are interested in the Theory, but who are not conversant with the mathematical apparatus of theoretical physics.
The work presumes a standard of education corresponding to that of a university matriculation, and, despite the shorteness of the book, a fair amount of patience and force of will on the part of the reader."

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$16,70 (US).

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