Overlap-hypercube Dirac operator

HMC histories for dynamical overlap fermions tend to stay in a xed top. sector for many trajectories. Therefore the suitable summation of observables, which have been measured in separate sectors, is a major challenge. We explore several techniques for this issue, based on data for the chiral condensate and \meson " masses in the 2- avour Schwinger model with dynamical overlap-hypercube fermions. 1 Schwinger model (QED2)