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cyclotomic identity : ウィキペディア英語版 | cyclotomic identity In mathematics, the cyclotomic identity states that : where ''M'' is Moreau's necklace-counting function, : and ''μ'' is the classic Möbius function of number theory. The name comes from the denominator, 1 − ''z'' ''j'', which is the product of cyclotomic polynomials. The left hand side of the cyclotomic identity is the generating function for the free associative algebra on α generators, and the right hand side is the generating function for the universal enveloping algebra of the free Lie algebra on α generators. The cyclotomic identity witnesses the fact that these two algebras are isomorphic. There is also a symmetric generalization of the cyclotomic identity found by Strehl: : ==References==
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