Absence of super-exponentially decaying eigenfunctions on Riemannian manifolds with pinched negative curvature

Andras Vasy, Jared Wunsch

Let (X,g) be a metrically complete, simply connected Riemannian manifold with bounded geometry and pinched negative curvature, i.e. there are constants a>b>0 such that -a^2<K<-b^2…