On the Uniqueness of the $G$-Equivariant Spectral Flow

Marek Izydorek, Joanna Janczewska, Maciej Starostka +1

The spectral flow is an integer-valued homotopy invariant for paths of selfadjoint Fredholm operators. Lesch as well as Pejsachowicz, Fitzpatrick and Ciriza independently showed th…