Flow of low energy couplings in the Wilson renormalization group
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A new form of the Wilson renormalization group equation is derived, in which the flow equations are, up to linear terms, proportional to a gradient flow. A set of coördinates is found in which the flow of marginal, low-energy, couplings takes a gradient form, if relevant couplings are tuned to vanish.
9 pages, RevTeX. Version to appear in Phys. Rev. D
9 pages, RevTeX. Version to appear in Phys. Rev. D