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Encyclopedia > Cauchy horizon

In physics, a Cauchy horizon is a light_like boundary of the domain of validity of a Cauchy problem.

The simplest example is the internal horizon of a Reissner_Nordstrom black hole.

  Results from FactBites:
Time Travel [Internet Encyclopedia of Philosophy] (7856 words)
If an intrepid astronaut were to position herself near the horizon of the rapidly spinning center of a fl hole (without falling into its center and possibly being annihilated), she would be treated to a most remarkable form of time travel.
To enter the region where time travel might be possible, one would have to cross the Cauchy horizon, the hourglass-shaped (for two crossing cosmic strings) boundary of the singularity in which the laws of physics are unknown.
In closed spacetime, the Cauchy horizon of a CTC acts as an impenetrable barrier to a timelike worldline for objects.
  More results at FactBites »



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