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In this short note we present a simple counterexample to a nonlinear versionof the Krein-Rutman theorem reported in [Nonlinear Anal. 11 (2007), 3084-3090].Correct versions of this theorem, and related results for superadditive mapsare also presented.

A counterexample to a nonlinear version of the Krein-Rutman theorem by R. Mahadevan