Difference between revisions of "1996 IMO Problems/Problem 3"

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Revision as of 16:01, 6 October 2023

Problem

Let $S$ denote the set of nonnegative integers. Find all functions $f$ from $S$ to itself such that

$f(m+f(n))=f(f(m))+f(n)$ $\forall m,n \in S$

Solution

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