Download original image
Fig. 8. For degenerate cases, coefficients such as cfi(3) can be obtained from the Feynmann diagrams with three dots with possible crosses which denote fake interactions. The total number of dots and crosses is equal to the order of the approximation.
New Phys.: Sae Mulli 2022;72:537~543 https://doi.org/10.3938/NPSM.72.537
© NPSM