MathDB
Putnam 2010 B5

Source:

December 6, 2010
Putnamfunctionlimitintegrationinductioninequalitieslogarithms

Problem Statement

Is there a strictly increasing function f:R→Rf:\mathbb{R}\to\mathbb{R} such that f′(x)=f(f(x))f'(x)=f(f(x)) for all x?x?
Back to ProblemsView on AoPS