Peeling theorem
In general relativity, the peeling theorem describes the asymptotic behavior of the Weyl tensor as one goes to null infinity. Let  be a null geodesic in a spacetime  from a point p to null infinity, with affine parameter . Then the theorem states that, as  tends to infinity:

where  is the Weyl tensor, and we used the abstract index notation. Moreover, in the Petrov classification,  is type N,  is type III,  is type II (or II-II) and  is type I.

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General relativity
Theorems in general relativity