In formulating GR, Einstein was motivated by the otherwise strange coincidence of the equivalence of gravitational and inertial mass. He removed this by discovering that trajectories determined by gravitation are actually inertial. However, gravity's source is still the tensor T, which is closely related to mass. Isn't this the same coincidence?(adsbygoogle = window.adsbygoogle || []).push({});

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# Mass equivalence solved?

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