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Some papers say that Palatini Formalism still works if the frame variables [tex]e^i_a[/tex]

is not an isomorphism (from tangent bundle to frame bundle), this generalizes GR to include the cases of degenerate metric.

But one could not derive the Einstein's Equation if [tex]e^i_a[/tex] is not an isomorphism!!

Somebody please explain to me how it works?

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# Palatini Formalism generalizes GR to include degenerate metric?

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