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A central and common aspect of renormalizable field theories is scaleinvariance of the action integral. This note introduces the software tool\emph{Kanon}, which allows to assemble arbitrary action integralsinteractively, and to determine their critical dimension and scale invariance.The tool contains more than 60 well-known models with comments and referencesto the literature.

The ABC of scale invariance at the level of action integrals, and the software tool Kanon