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|    sci.math.symbolic    |    Symbolic algebra discussion    |    10,432 messages    |
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|    Message 8,879 of 10,432    |
|    Nasser M. Abbasi to All    |
|    three different results for an integral,    |
|    12 Sep 15 03:08:48    |
   
   From: nma@12000.org   
      
   Mathematica 10.1, windows 7:   
      
   -----------------------------   
   Clear[a, x];   
   solM = Integrate[x/Sqrt[2 a x - x^2], x];   
   solM /. {a -> 0.3, x -> 1}   
   -------------------------   
   0. -0.926507 I   
      
   Rubi 4.8/Mathematica 10.1:   
   ----------------------   
   ShowSteps = False;   
   Clear[x, a];   
   solRubi = Int[x/Sqrt[2 a x - x^2], x];   
   solRubi /. {a -> 0.3, x -> 1}   
   ----------------------   
   -0.942478-1.07975 I   
      
   Maple 15.1, windows 7   
   --------------------   
   restart;   
   sol:=int(x/sqrt(2*a*x-x^2),x):   
   evalf(subs({a=0.3,x=1},sol));   
   ---------------------   
   -.4712388981-1.079754425*I   
      
   Maple and Rubi agree on the complex part but not the real part.   
   Seems like another brach cut issue?   
      
   --Nasser   
      
   --- SoupGate-Win32 v1.05   
    * Origin: you cannot sedate... all the things you hate (1:229/2)   
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