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Search options not deleted user 146723
2 votes
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book recommendation about iterative functional equations [closed]

I would like to learn about iterative functional equations. I read this book, but it doesn't include such functional equations. I tried this, but it was too general for my purpose. Finally I read th …
Kώστας Κούδας's user avatar
3 votes
0 answers
218 views

Criteria for $f(f(x))=g(x)$

I 'm searching about the solvability of the functional equation $f(f(x))=g(x)$. I have three questions about it: Let's be $g$ an arbitrary function and the functional equation $f(f(x))=g(x)$. Are th …
Kώστας Κούδας's user avatar