exercise set No.11

There won't be a 'proper' exercise sheet this week. Instead, for next Monday,

i) look again into the last problem of exercise set 10, which wasn't fully discussed yet

ii) fill in the 'gaps' in today's lecture, i.e. derive the 3-point gauge boson coupling in the functional formalism, and do the "quick" way for both 3-point and 4-point vertices. Finally, try to revisit the technical steps that led to the appearance of the ghost fields in the Yang-Mills Lagrangian once the gauge is fixed.