Abstract
This paper is concerned with the ergodic problem for viscous Hamilton–Jacobi equations with superlinear Hamiltonian, inward-pointing drift, and positive potential function which vanishes at infinity. Assuming some radial symmetry of the drift vector field and the potential function outside a large ball, we obtain sharp estimates of the generalized principal eigenvalue with respect to a perturbation of the potential function. We also specify the necessary and sufficient condition so that the spectral function contains a plateau.
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