MathDB
IMO shortlist 2014 A4

Source:

July 11, 2015
functionIMO Shortlistalgebrafunctional equationIMO Shortlist 2014

Problem Statement

Determine all functions f:Z→Zf: \mathbb{Z}\to\mathbb{Z} satisfying f(f(m)+n)+f(m)=f(n)+f(3m)+2014f\big(f(m)+n\big)+f(m)=f(n)+f(3m)+2014 for all integers mm and nn.
Proposed by Netherlands