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We study how to compute the operator product expansion coefficients in theexact renormalization group formalism. After discussing possible strategies, weconsider some examples explicitly, within the $\epsilon$-expansions, for theWilson-Fisher fixed points of the real scalar theory in $d=4-\epsilon$dimensions and the Lee-Yang model in $d=6-\epsilon$ dimensions. Finally wediscuss how our formalism may be extended beyond perturbation theory.

Operator product expansion coefficients in the exact renormalization group formalism