Approximations of delocalized eta invariants by their finite analogues
Approximations of delocalized eta invariants by their finite analogues
For a given self-adjoint first order elliptic differential operator on a closed smooth manifold, we prove a list of results on when the delocalized eta invariant associated to a regular covering space can be approximated by the delocalized eta invariants associated to finite-sheeted covering spaces. One of our main results …