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[–] littul_kitton 0 points 0 points (+0|-0) ago 

One of the keys to the achievement was to develop a completely novel graph theoretic approach, which allowed the researchers to classify and combine the Feynman diagrams used to describe particle behavior in a new way. More specifically, the approach makes it possible to precisely calculate infinite sums of all the possible permutations (or arrangements) of disconnected subdiagrams describing the particle trajectories.

You should have put Feynman diagrams and graph theory in the title. I almost didn't read this. It's cool to see discrete math being used in physics.