"plethysm" meaning in English

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          "ref": "2015, Thomas Kahle, Mateusz Michalek, “Obstructions to combinatorial formulas for plethysm”, in arXiv:",
          "text": "Motivated by questions of Mulmuley and Stanley we investigate quasi-polynomials arising in formulas for plethysm.",
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        "A particular group-theoretic operation on a set of functions of a given symmetry type."
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        "(algebra) A particular group-theoretic operation on a set of functions of a given symmetry type."
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