caa a22 4500 46788272X CHVBK 20180406152724.0 cr unu---uuuuu 170328e20060801xx s 000 0 eng 10.1007/s10485-006-9033-8 doi (NATIONALLICENCE)springer-10.1007/s10485-006-9033-8 Fiorenza Domenico Dipartimento di Matematica "Guido Castelnuovo”, Università degli Studi di Roma, "La Sapienza”, Piazzale Aldo Moro 2, 00185, Roma, Italy aut Sums over Graphs and Integration over Discrete Groupoids [Elektronische Daten] [Domenico Fiorenza] 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. Springer Science + Business Media B.V., 2006 Feynman diagrams nationallicence PROPs nationallicence groupoids nationallicence Gaussian integrals nationallicence Applied Categorical Structures Kluwer Academic Publishers 14/4(2006-08-01), 313-350 0927-2852 14:4<313 2006 14 10485 https://doi.org/10.1007/s10485-006-9033-8 text/html Onlinezugriff via DOI 1 research-article jats NATIONALLICENCE 856 40 https://doi.org/10.1007/s10485-006-9033-8 text/html Onlinezugriff via DOI NATIONALLICENCE 100 1- Fiorenza Domenico Dipartimento di Matematica "Guido Castelnuovo”, Università degli Studi di Roma, "La Sapienza”, Piazzale Aldo Moro 2, 00185, Roma, Italy aut NATIONALLICENCE 773 0- Applied Categorical Structures Kluwer Academic Publishers 14/4(2006-08-01), 313-350 0927-2852 14:4<313 2006 14 10485 Metadata rights reserved Springer special CC-BY-NC licence nationallicence BK010053 XK010053 XK010000 NATIONALLICENCE NATIONALLICENCE NL-springer