Abstract
An alternative derivation of general relativity is presented in which the field equations are derived from a gauge invariant quadratic Lagrangian by varying the affine field Gamma bca and keeping the geometry fixed. The field equations show that the Gamma bca can be considered as a Christoffel connection of a tensor gab and if, after the variation, the metric tensor is chosen to be this tensor, the field equations of general relativity with a cosmical constant are recovered.
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