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Paper detail

Sums over Graphs and Integration over Discrete Groupoids

We show that sums over graphs such as appear in the theory of Feynman diagrams can be seen as integrals over discrete groupoids. From this point of view, basic combinatorial formulas of the theory of Feynman diagrams can be interpreted as pull-back or push-forward formulas for integrals over suitable groupoids.

preprint2005arXivOpen access
Domenico Fiorenza
math.COmath.CTmath-phmath.MP
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Domenico Fiorenza

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