Yeah, Dyson is like 85 % of the reason we have Feynman diagrams and not some other way of calculating QFT processes. See this for more: http://www.press.uchica

Yeah, Dyson is like 85 % of the reason we have Feynman diagrams and not some other way of calculating QFT processes. See this for more: http://www.press.uchicago.edu/ucp/books/book/chicago/D/bo3534300.html http://www.press.uchicago.edu/ucp/books/book/chicago/D/bo353...