
In this paper I shall discuss the problem of specifying the boundary conditions that must be used in the solution of light-cone constraint equations. The problem may be expressed as the specification of integration constant fields to be added to the commonly used solutions to these constraint equations. These integration constant fields are unphysical and nondynamical; but they affect the dynamics of physical fields and change the results of the calculations of measurable quantities. I shall illustrate these remarks with examples from QED and QCD.
| selected citations These citations are derived from selected sources. This is an alternative to the "Influence" indicator, which also reflects the overall/total impact of an article in the research community at large, based on the underlying citation network (diachronically). | 1 | |
| popularity This indicator reflects the "current" impact/attention (the "hype") of an article in the research community at large, based on the underlying citation network. | Average | |
| influence This indicator reflects the overall/total impact of an article in the research community at large, based on the underlying citation network (diachronically). | Average | |
| impulse This indicator reflects the initial momentum of an article directly after its publication, based on the underlying citation network. | Average |
