Today this form is interpreted as the relativistic field equation for spin-0 particles . making the equation a generic expression of quantum fields.
2.
Eddington emphasized what he considered to be epistemological considerations; for example, he thought that the cosmological constant version of the general-relativistic field equation expressed the property that the universe was " self-gauging ".
3.
Further, taking this approach with the simplest feasible basis for the variational principle resulted in a field equation having the form of Einstein's general-relativistic field equation with a cosmological term arising " automatically ".
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