XPost: sci.math   
   From: eee@spi.pl   
      
   Paul B. Andersen wrote:   
      
   > or:   
   >    dτ = √(1 − v²/c²)dt                                    (3)   
   >    where v² = (dx/dt)² + (dy/dt)² + (dz/dt)²   
   >   
   > (1), (2) and (3)  are the same metric.   
      
   why not making it one dimension, in SR one dimension is essential. Wrt an   
   observer the others are superfluous   
      
   --- SoupGate-Win32 v1.05   
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