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May 10th, 2012, 04:03 AM  #1 
Newbie Joined: May 2012 Posts: 10 Thanks: 0  Functional Equation
It is easy to see that f(x)=x(x  1) is a solution of the functional equation f(f(x)) = f(x)(f(x)  1) , the question is , is there any other solution of the functional equation?


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