Abstract
The meaning of the on-shell variation of the effective action is clarified. The higher orders in the on-shell expansion can be summed up into the coherent state. From these observations, the effective action is shown to have really the property of a generating functional of the -matrix elements.
- Received 19 June 1990
DOI:https://doi.org/10.1103/PhysRevD.42.2792
©1990 American Physical Society
