From: PointedEars@web.de   
      
   Thomas 'PointedEars' Lahn wrote:   
   > Therefore, the correct formula is [...] (exact)   
   >   
   >   T = T_1 + T_2 = m_1 c^2 [gamma(V_1) - 1] + m_2 c^2 [gamma(V_2) - 1],   
   >   
   > where the V's are the velocities, and the P's are the linear momenta;   
   > [...]   
   >   
   > [This is a consequence of the energy--momentum relation   
   > E^2 = m^2 c^4 + p^2 c^2: For m != we have p = gamma m v,   
   > and thus E = gamma m c^2.]   
      
   I meant: m != 0 ("m not equal to zero").   
      
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   PointedEars   
      
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