New approximate solutions of the Ginsparg-Wilson equation - tests in 2-d
  A new method for finding approximate solutions of the Ginsparg-Wilson equation is tested in 2-d. The Dirac operator is first constructed and then used in a dynamical simulation of the 2-flavor Schwinger model. We find a very small mass of the pi-particle implying almost chirally symmetric fermions. The generalization of our method to 4-d is straightforward. 
Christof Gattringer (MIT) and Ivan Hip (NIC)