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Div curl black holes

  1. Jul 24, 2009 #1
    What is the divergence and curl at the edge of a black hole?
     
  2. jcsd
  3. Jul 24, 2009 #2

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    Divergence and curl of what?
     
  4. Jul 24, 2009 #3
    Whatever black holes continually suck into themselves continually
     
  5. Jul 25, 2009 #4
    Did you tried to say something like " the linear momentum and angular momentum of a mass crossing the horizon of a BH"? For instance, divergence would be useful for studying if there are sources or sinks in a field (for a BH the divergence of the gravitational field is negative as usual).
     
    Last edited: Jul 25, 2009
  6. Jul 26, 2009 #5
    the div and curl of most things at the edge of a black hole is nothing special, since this is the event horizon.
     
  7. Jul 26, 2009 #6

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    Div and curl operate on vector fields, not "whatevers". You need to specify what vector field for this even to be a question.

    At the risk of sounding like a broken record, let me recommend Schey's Div, Grad, Curl and All That.
     
  8. Jul 26, 2009 #7
    Am I missing something? I really don't know anying about GR but to capture the black holeness wouldn't you have to work in 4-space. The cross product is not defined in 4 dimensions.
     
  9. Jul 26, 2009 #8
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