Entwurf einer verallgemeinerten Relativitätstheorie und einer Theorie der Gravitation. Outline of a Generalized Theory of Relativity and of a Theory of Gravitation

by Albert Einstein, Marcel Grossmann

$2,900 · Offered by Manhattan Rare Books

One of the turning-points in the development of relativity theory. Einstein had realized that he could proceed no further without expert mathematical help, and called upon his friend Michael Grossmann to supply it. Using the tensor calculus, the two were able to write a mathematical representation of gravitation representing a tenfold expansion from Newton's single gravitational potential - yet Einstein, with the problems of physical interpretation still unresolved, backed away from the

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