The Dirac operator on generalized Taub-NUT spaces

Abstract

We find sufficient conditions for the absence of harmonic L2 spinors on spin manifolds constructed as cone bundles over a compact K\"ahler base. These conditions are fulfilled for certain perturbations of the Euclidean metric, and also for the generalized Taub-NUT metrics of Iwai-Katayama, thus proving a conjecture of Vi and the second author.

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