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  1. Xref: sparky sci.math:10511 sci.physics:13327
  2. Path: sparky!uunet!dtix!darwin.sura.net!udel!rochester!cantaloupe.srv.cs.cmu.edu!crabapple.srv.cs.cmu.edu!nickh
  3. From: nickh@CS.CMU.EDU (Nick Haines)
  4. Newsgroups: sci.math,sci.physics
  5. Subject: Re: tensors: How about 3rd, 4th rank?
  6. Message-ID: <NICKH.92Aug22171434@VOILA.VENARI.CS.CMU.EDU>
  7. Date: 22 Aug 92 22:14:34 GMT
  8. References: <1992Aug20.190041.6215@pellns.alleg.edu>
  9.     <israel.714359708@unixg.ubc.ca> <5130@tuegate.tue.nl>
  10.     <5134@tuegate.tue.nl> <3djygrk@rpi.edu>
  11. Sender: news@cs.cmu.edu (Usenet News System)
  12. Organization: School of Computer Science, Carnegie Mellon University
  13. Lines: 7
  14. In-Reply-To: pierct@rpi.edu's message of 21 Aug 92 18:29:03 GMT
  15. Originator: nickh@VOILA.VENARI.CS.CMU.EDU
  16. Nntp-Posting-Host: voila.venari.cs.cmu.edu
  17.  
  18. - rank-2 tensors are not matrices. Matrices are simply ordered sets of
  19. scalars. The difference between a tensor and a scalar is in their
  20. behaviour under changes of coordinates.
  21.  
  22. - 3rd and 4th order tensors crop up all the time in GR.
  23.  
  24. Nick Haines nickh@cs.cmu.edu
  25.