Abstract
The symmetric function theorem states that a polynomial that is invariant under permutation of variables, is a polynomial in the elementary symmetric polynomials. We deduce this classical result, in the analytic setting, from the multivariate Faà di Bruno formula. In two variables, this allows us to completely determine all coefficients that occur in the inductive equations.
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Acknowledgements
The author would like to thank Léo Jiminez for discussing the interesting combinatorial phenomenon we encountered, especially for writing down a formula for the map \(\phi \).
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Van Hille, S. The symmetric function theorem via the multivariate Faà di Bruno formula. European Journal of Mathematics 9, 81 (2023). https://doi.org/10.1007/s40879-023-00679-0
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DOI: https://doi.org/10.1007/s40879-023-00679-0