2026-07-072026-07-07http://salesiana.dossiersoluciones.com/handle/123456789/191480We investigate the lattice index theorem and the localization of the zero-modes for thick classical center vortices. For non-orientable spherical vortices, the index of the overlap Dirac operator differs from the topological charge although the traces of the plaquettes deviate only by a maximum of 1.5% from trivial plaquettes. This may be related to the fact that even in Landau gauge some links of these configuration are close to the non-trivial center elements.9 pages, some corrections includedHigh Energy Physics - Latticetext