  We address the problem of the fermion species doubling on the Lattice. Our
strategy is to factorize the fermion doubles from the action. The mass term of
the Dirac-Wilson action is changed. In this case the extra roots which appear
in the action of free fermions in the moment representation are independent of
the mass and can be factorized from the fermion propagator. However the gauge
couplings suffer from the pathological ghost poles which are common to
non-local actions. This action can be used to find a solution of the Ginsparg
Wilson relation, which is cured from the non-local pathology. Finally we
compare this factorized action with solutions of The Ginsparg Wilson relation.
We find that the present is equivalent to the Zenkin action, and that is not
quite as local as the Neuberger action.
