# A fermionic field is represented by a solid line attached to the point with an arrow toward the point ;
# A fermionic field is represented by a solid line attached to the point with an arrow from the point ;
0.009 seconds.
# A fermionic field is represented by a solid line attached to the point with an arrow toward the point ;
# A fermionic field is represented by a solid line attached to the point with an arrow from the point ;
0.009 seconds.