The Foundations of Einstein's Theory of Gravitation

according to Einstein's assumptions centrifugal forces classical mechanics colours conception continuous manifold corresponding curvature denote differential equations differential laws ds² dx₁ earth Einstein's theory electrodynamical equality of inertial equations of transformation Euclidean experience fact finite fundamental laws geodetic lines geometry gravitational field gravitational mass gravitational phenomena gravitational potentials hypotheses inertia of energy inertial and gravitational inertial mass infinitely near points influence latter law of inertia line-element Lorentz-Einstein mathematical measure measure-relations metric relations motion relatively motions of bodies moving Neumann Newton's mechanics Newton's theory observed path perihelion physical events physical laws planet point-mass Poisson's equation possible postulate principle of relativity quantities question ray of light regarded relative motions relativity-principle result Riemann rotation space-time manifold special theory straight line stream surface system of coordinates system of reference theory of gravitation theory of relativity time-measurements uniform rectilinear motion velocity of light vide Note W. K. Clifford x₁