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

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   Message 8,952 of 10,432   
   Nasser M. Abbasi to Axel Vogt   
   Re: if result of dsolve contains integra   
   08 Jan 16 15:17:48   
   
   From: nma@12000.org   
      
   On 1/6/2016 12:51 PM, Axel Vogt wrote:   
      
   > I prefer the inert form, as it gives information about the   
   > structure. There may be situations where you even have a   
   > double integral. Or some implicit solution (?).   
   >   
   > It is easy to get it (if it works): use value(%) or use   
   > eval(%, Int = int).   
   >   
   > Note however: if "value" does not succeed then any further   
   > usage of the result again will try to 'compute' the integral   
   >   
   >   
      
   Ok, I need your help more on this please.   
      
   The above method does not always work:   
      
      
   result_of_solve:=dsolve(a*diff(y(x),x)^2+b*x^2*diff(y(x),x)+c*x*y(x) = 0,y(x));   
   result_of_solve:=eval(result_of_solve, Int = int);   
      
   I get error   
      
   Error, (in discont/zero) too many levels of recursion   
      
   I am trying to evaluate any inert result from maple, so   
   I can get the actual result. Not knowing if the result has   
   indert Int in it or not, so I am calling eval(result_of_solve, Int = int)   
   on every one.   
      
   But this does not work sometimes, as in the above case.   
      
   Is there a better way to handle this?   
      
   I wish there is a way to tell Maple not to   
   use Inert anything in its answers ! This is very   
   annoying.   
      
   thanks,   
      
   --Nasser   
      
   --- SoupGate-Win32 v1.05   
    * Origin: you cannot sedate... all the things you hate (1:229/2)   

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