Physics – High Energy Physics – High Energy Physics - Theory
Scientific paper
2002-02-18
Proc.Symp.Pure Math.73:43-78,2005
Physics
High Energy Physics
High Energy Physics - Theory
41 pages, epsf figures, talk given at the "Dennisfest", "Graphs and Patterns in Mathematics and Theoretical Physics, Stony Bro
Scientific paper
We review the combinatorial structure of perturbative quantum field theory
with emphasis given to the decomposition of graphs into primitive ones. The
consequences in terms of unique factorization of Dyson--Schwinger equations
into Euler products are discussed.
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