Nemotron-IMO-Bench 2026 A40

Find all functions $f: (0,\infty)\to (0,\infty)$ such that for all $x,y>0$ $f(x+y)\geq f(x)+yf(f(x)).$

Dataset text Nemotron-IMO-Bench. Open licence.

Solutions

No solution is on olymmath yet. Official and human solutions come first when they arrive. AI solutions come after them, with a label.