Ultralocality on the lattice
  It is shown that the nonlocal Dirac operator yielded by a lattice model that preserves chiral symmetry and uniqueness of fields, approaches to an ultralocal and invariant under translations operator when the size of the lattice tends to zero. 
Rafael G. Campos, Eduardo S. Tututi (Escuela de Ciencias   Fisico-Matematicas, Universidad Michoacana, Morelia, Mexico)