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*At fixed points of the [[RG flow]], which are specified by a set of fixed-point couplings <math>g^*_i</math>, the function <math>C(g^*_i,\mu)=C_*</math> is a constant, independent of energy scale.
The theorem formalizes the notion that theories at high energies have more [[Degrees of freedom (physics and chemistry)|degrees of freedom]] than theories at low energies and that information is lost as we flow from the former to the latter.
==Two-dimensional case==
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