From: seki.hajime01@gmail.com   
      
   Hawking radiation postulates that particles with negative energy   
   fall into a black hole.   
      
   Einstein's gravitational equation is presented in terms of linear   
   expression of energy-momentum tensor.   
   So, I suppose that particles with negative energy, if actually   
   present, are to be repelled by the black hole.   
      
   Then, isn't Hawking radiation unrealistic?   
      
   SEKI   
      
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