On Saturday, 6 February 2016 01:48:12 UTC+1, Richard Fateman  wrote:   
   > I'm guessing that you are using wxmaxima which displays   
   > %pi   and   pi   
   > the same.  unfortunately.   As the lower-case Greek letter.   
      
   Indeed I confirm your hypothesis. Thank you very much for your answer. I use   
   maxima quite rarely, and I did not realize that wxmaxima reports Greek pi for   
   both "pi" and "%pi", but they are symbolically not the same. By using %pi in   
   the Gaussian    
   normalization I do obtain the simplification to 1.   
       
   > %pi is the name for the ratio of the circumference to the   
   > diameter of a circle.   pi is   
   >   some other symbol like pi, pj, pk.   
   >    
   > You computation produced sqrt(%pi)/sqrt(pi).   
   > Which is why it doesn't reduce.  To fix your program, replace pi   
   > by %pi.  Then the answer comes out 1.   
      
   Greetings,   
   --   
   Alberto   
      
   --- SoupGate-Win32 v1.05   
    * Origin: you cannot sedate... all the things you hate (1:229/2)