More about exactly massless quarks on the lattice

In a previous publication [Phys. Lett. B 417 (1998) 141, hep-lat/9707022] I showed that the fermion determinant for strictly massless quarks can be written on the lattice as detD, where D is a certain finite square matrix explicitly constructed from the lattice gauge fields. Here I show that D obeys the Ginsparg-Wilson relation Dγ5D=Dγ5+γ5D.