Dirac equation and path integral

[Stalebhacine]

Hello
How to get the propagator for the Dirac equation (1+1) and forth and what about the Feynman's Checkerboard (or Chessboard) model
Thanks I need Your help

[dextercioby]

Hmm, what do you mean by "(1+1)" ? And what is Feynman's Checker/chessboard model?

Daniel.