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   sci.math.symbolic      Symbolic algebra discussion      10,432 messages   

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   Message 10,009 of 10,432   
   Nasser M. Abbasi to All   
   hard integral   
   12 Mar 20 20:51:32   
   
   From: nma@12000.org   
      
   This came up in different forum.   
      
   https://mathematica.stackexchange.com/questions/216166/how-can-a   
   simplify-the-following-equation   
      
        Integrate[(1 + Log[x])*Sqrt[1 + 1/(x^2 Log[x]^2)]   
      
   I tried Fricas, Mathematica and Rubi 4.16.1 and Maple 2020   
   on it, and non could solve it.   
      
   In Fricas, it gives this (it looks like incomplete Risch implementation?)   
      
   >> Error detected within library code:   
       integrate: implementation incomplete (constant residues)   
      
   Yet, as shown by the answer given in the other forum by Artes that his clever   
   substitution u=x*ln(x) resulted in integrand which can be easily solved.   
      
   I would have expected these top CAS systems to therefore solve this.   
      
   --Nasser   
      
   --- SoupGate-Win32 v1.05   
    * Origin: you cannot sedate... all the things you hate (1:229/2)   

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