Introduction to Renormalization
Renormalization-group methods are relevant to a large diversity of elds)many (apparently) di erent implementations)sometimes hard to access!Functional RG provides uni ed formulation. 1.2 Phase transitions • Sketchy phase diagram of water: theory space S! + h T Tc m ! 0 m = 0 m > 0 m < 0 FM PM temperature r
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