olymmath

SMO 2007 Problem 4

    find all functions f:N→Nf:\mathbb{N}\rightarrow\mathbb{N} st f(f(m)+f(n))=m+n ∀m,n∈Nf(f(m)+f(n))=m+n \,\forall m,n\in\mathbb{N} related: https://artofproblemsolving.com/community/c6h381298

    Dataset text AI-MO AoPS. Quoted with source.

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