1. Feb 20, 2007 #1

   Terilien

   

   I have heard of this principle before, but how can we show that it is true?

    

   Terilien, Feb 20, 2007
2. 
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3. Feb 21, 2007 #2

   dextercioby

   

   Science Advisor

   Homework Helper

   Insights Author

   Only by comparing it with the other known variational principles in relativity.

    

   dextercioby, Feb 21, 2007

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