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Bialgebra of specified graphs and external structures

We construct a Hopf algebra structure on the space of specified Feynman graphs of a quantum field theory. We introduce a convolution product and a semigroup of characters of this Hopf algebra with values in some suitable commutative algebra taking momenta into account. We then implement the renormalization described by A. Connes and D. Kreimer and the Birkhoff decomposition for two renormalization schemes: the minimal subtraction scheme and the Taylor expansion scheme.

preprint2014arXivOpen access
Dominique ManchonMohamed Belhaj Mohamed
math.QA
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Open access2 authors1 topic
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Dominique ManchonMohamed Belhaj Mohamed

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