First of all, Happy New Year! I have to solve the following exercise (xmas gift :P) and some things are a bit vague..Here is it: For the ee--->ee scattering process, draw all amputated and connected graphs that would contribute. The hint is that one should find 10 different contributions.
QED Feynman rules and graph amputation rules, check S-matrix and LSZ Reduction Formula.
The Attempt at a Solution
My first move was to go for a rigorous computation but as you can imagine it didnt work out. Then I tried ti be more practical and drew as many contributions for one loop correction to te process i could. Finally I ended up with four, as I cant go blind with it, I mean I have to step on a solid basis (ie formula) to start to draw more. The four diagramms I drew can be seen in the following image. How can I find seven more of them?? I suppose using brute force is not the deal and I'm very confused. Thank you in advance for your help. Happy New year!