The Wilson exact renormalization group equation and the anomalous dimension parameter
classification
✦ hep-th
keywords
equationanomalousdimensionexactfirstgroupoperatorparameter
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The non-linear way the anomalous dimension parameter has been introduced in the historic first version of the exact renormalization group equation is compared to current practice. A simple expression for the exactly marginal redundant operator proceeds from this non-linearity, whereas in the linear case, first order differential equations must be solved to get it. The role of this operator in the construction of the flow equation is highlighted.
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