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Oct 16, 2021 at 12:20 comment added Ben McKay The question is about the curvature of a Riemannian metric. The curvature of a plane curve is not the curvature of any Riemannian metric, because every Riemannian metric in dimension 1 is flat: the curvature tensor is a 2-form valued in endomorphisms of the tangent bundle.
Oct 16, 2021 at 12:15 comment added user44143 I think the question begins with dimension 2, but this is a good answer for the simpler 1-dimensional case.
Oct 16, 2021 at 12:08 history answered Carlo Beenakker CC BY-SA 4.0