The renormalization group evolved from ad hoc procedures to cope with divergences in perturbative calculations. This Comment summarizes efforts to develop a mathematically rigorous approach to renormalization group calculations.
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Acknowledgements
A.K. was supported by the Academy of Finland and European Research Council Advanced Grant 741487.
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Kupiainen, A. Rigorous renormalization group. Nat. Phys. 19, 1539–1541 (2023). https://doi.org/10.1038/s41567-023-02233-x
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DOI: https://doi.org/10.1038/s41567-023-02233-x
