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Physics, Astronomy & Cosmology / Re: Who claimed that gravity is a curvature in spacetime?
« on: 20/04/2018 16:26:57 »
Suppose a function f(x,y,z,t). f is zero in a region around (x0,y0,z0,t0). All derivatives of f are also zero. So, it is not possible all Christoffel symbols be zero while some of its derivatives escape this fate.
That is the reason for the Riemann tensor be zero in this case.
That is the reason for the Riemann tensor be zero in this case.