XPost: sci.math   
   From: edgar@math.ohio-state.edu.invalid   
      
   > On 2014-08-28, IV  wrote:   
      
   > >> How does your method work for solving for x in    exp(x)=log(x) ?   
   > > With LambertW.   
   > > I see, the inverse function of a Real Elementary function somehow composed   
   > > from the Real Elementary Standard functions is not necessarily an   
   > > Elementary   
   > > function.   
      
      
   In article , Herman Rubin   
    wrote:   
      
   >   
   > The inverse of an elementary function is an elementary function.   
   >   
      
   It seems IV was responding to an assertion like this:  x e^x is   
   elementary, but its inverse, the Lambert W function, is not.   
      
   --   
   G. A. Edgar                              http://www.math.ohio-state.edu/~edgar/   
      
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