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The restricted principle of relativity
The general theory of relativity Field equations and equations of the geodesic
General character of the theory of relativity
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Acad actual universe approximation astronomical axis classical mechanics coefficient of expansion computed consequently constant curvature corresponding cosh curves density determined diagram distances Doppler effect Eddington Einstein ellipse empty universes energy tensor equations of motion euclidean space expanding solutions expanding universes fictitious forces field equations figure finite force formulae four-dimensional continuum fundamental equation galactic systems galilean geodesic given gives gravitational field homogeneous increases infinity integration invariant isotropic km/sec law of inertia limiting value line element mass material particles mechanics minimum value neglected neighborhood Newton's non-static solutions numerical observed oscillating universes physical positive possible precession projection on euclidean radial velocity radius vector ray of light real solution rotation second kind second order sinh sinh2 Sitter space coordinates spherical spiral nebulae stars static solution static universes theory of relativity three-dimensional space trajectories velocity of light world-lines zero