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This tag is for questions which relates with the renormalization, an ensemble of techniques which serves to treat the infinities which appear in quantum field theory or statistical mechanics. Renormalization procedures are based on the requirement that certain physical quantities (such as the mass and charge of an electron) equal observed (experimental) values.

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Relation between perturbative renormalization and RG group flow

"A geometrical formulation of the renormalization group method for global analysis." Progress of theoretical physics 94.4 (1995): 503-514. …
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