Maximum density and minimum electron fraction Y_e in the simulations G14, J02 and H01 (see Table 1). In the G and J simulations ( and 9.95), respectively, the maximum density drops by several orders of magnitude in the first 5 s despite the marked decrease in the minimum Y_e, leading to the partial disruption of the core and the formation of an ONeFe white dwarf that does not collapse to form a neutron star. In the H01 simulation (), the maximum density only increases with time, reaching 10¹¹ g cm^-3 in the first ~330 ms. The simulation was not continued beyond this point because neutrino interactions with matter were not included in the microphysics, however the most likely outcome is collapse into a neutron star.