• Corpus ID: 119372427

Topological Structure of The Upper End of Future Null Infinity

  title={Topological Structure of The Upper End of Future Null Infinity},
  author={S.Tomizawa and M.Siino},
We propose a method to determine the topological structure of an event horizon far in the future of a spacetime from the geometrical information of its future null infinity. In the present article, we mainly consider spacetimes with two black holes. Although, in most of cases, the black holes coalesce and their event horizon is topologically a single sphere far in the future, there are several possibilities that the black holes do not coalesce eternally and such exact solutions. In our… 

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