This chapter has focused on fluxes of conserved quantities in which the appearance and disappearance of world-lines would imply nonconservation of properties such as charge and mass-energy. But the mat...This chapter has focused on fluxes of conserved quantities in which the appearance and disappearance of world-lines would imply nonconservation of properties such as charge and mass-energy. But the mathematical techniques we’ve developed turn out to be an elegant way to approach the many different issues.
