By electric or magnetic fields we mean the vector fields →E(→r,t) and →B(→r,t) respectively. But a gravitational field in Newtonian theory is a vector field that →g(→r) that obeys ∇×→g=0 and ∇⋅→g=4πGρm. But in Einstein's theory we describe gravity as a tensor field gμν(x). How are these two descriptions of gravity, one in terms of the vector field →g(→r) and in other in terms of the tensor field gμν(x), compatible with each other in terms of the number of degrees of freedom? Thanks!
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