It has been some time since this subsection intent was written and some text generated. After a while we realized that the topic of the Dyson (D.) equation is pictured with some negative features already in the preceding subsection
and actually is not important for attention as long as, you guess, it is the incorrectly derived equation of averaged impact modeling.
We are talking about the derivation techniques used for this equation - the graph technique of Feynman, and why Feynman was doing that technique for, in the different field of Scaled physics as -
The other topic of announced in this subsection is the interesting one for discussion and we would be concerned little later on.