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Apr 24, 2014 at 15:12 comment added Otis Chodosh @WillieWong, Whoops you're right! Its fixed now, thanks!
Apr 24, 2014 at 15:12 history edited Otis Chodosh CC BY-SA 3.0
fixed minor mistake in a formula
Apr 24, 2014 at 7:48 comment added Willie Wong Two comments: (a) the first variation formula that you quoted only works for $DR|_{\bar{g}}$, that is, the variation near the metric of the round sphere, or Einstein manifolds with the correct $\lambda$. For general metrics $g_0(t)$ the last term should be replaced by a Ricci term. (b) Terry Tao gave a short derivation of the general variation formula for the scalar curvature (equation 15 in his blog entry).
Apr 23, 2014 at 20:16 vote accept Michael Pinkard
Apr 23, 2014 at 16:25 history answered Otis Chodosh CC BY-SA 3.0