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5 Algorithms and Codes for Finding Event Horizons

There are three basic event-horizon finding algorithms:

I describe these in detail in the following.

 5.1 Integrating null geodesics forwards in time
  5.1.1 Spherically-symmetric spacetimes
  5.1.2 Non-spherically-symmetric spacetimes
 5.2 Integrating null geodesics backwards in time
 5.3 Integrating null surfaces backwards in time
  5.3.1 Error bounds: Integrating a pair of surfaces
  5.3.2 Explicit Strahlkörper surface representation
  5.3.3 Level-set parameterization

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