2026-07-072026-07-07http://salesiana.dossiersoluciones.com/handle/123456789/119846A formula is given in terms of secondary characteristic classes for the leading order contribution to the spectral flow for a path of twisted Dirac operators on an odd dimensional, Riemannian manifold when the twisting is done by a path of unitary connections with large curvature.Differential GeometrySymplectic Geometry58J30; 58J28text