Abstract
Here, we address a uniqueness structure of viscosity solutions for ergodic problems of weakly coupled Hamilton–Jacobi systems. In particular, we study comparison principle with respect to generalized Mather measures as a generalization of the result proved by Mitake and Tran, which addressed the case of a single equation. To get the main result, it is important to construct Mather measures effectively. We overcome this difficulty by nonlinear adjoint methods.
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