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Text File  |  1992-12-30  |  795 b   |  17 lines
  1. Newsgroups: sci.physics
  2. Path: sparky!uunet!zaphod.mps.ohio-state.edu!cs.utexas.edu!qt.cs.utexas.edu!yale.edu!jvnc.net!newsserver.technet.sg!nuscc!matmcinn
  3. From: matmcinn@nuscc.nus.sg (Brett McInnes)
  4. Subject: The gravitational energy-momentum thingamajig
  5. Message-ID: <1992Dec30.064548.17030@nuscc.nus.sg>
  6. Organization: National University of Singapore
  7. X-Newsreader: Tin 1.1 PL4
  8. Date: Wed, 30 Dec 1992 06:45:48 GMT
  9. Lines: 6
  10.  
  11.  
  12. Many texts on GR mention,with various degrees of unease, the gravitational
  13. energy-momentum "pseudo-tensor". This arises when one attempts to pretend
  14. that the equation Div T = 0 corresponds to energy-momentum conservation.  
  15.  Can anyone tell me how to formulate this thing in coordinate-free terms?
  16. In other words, can one give a mathematically sensible definition of it?
  17.