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Main Question or Discussion Point
How does nonlinearity of the gravitational field equations follow from the equivalence principle? I remember hearing a handwaving example of this & I'm interested in more details.
The closer a collection of masses come together the less the sum of their inertial masses becomes. Hence, to maintain equivalence the total gravitational mass has to couple to this increasing "defecit".How does nonlinearity of the gravitational field equations follow from the equivalence principle? I remember hearing a handwaving example of this & I'm interested in more details.