Asssociative algebras under multi-commutator

For an associative algebra $A$ a skew-symmetric sum of $n!$ products of $n$ elements of $A$ in all possible order is called $n$-commutator. We consider $A$ as $n$-ary algebra under $n$-commutator. We prove that it has an identity of $ω$-degree $2$ (namely, homotopical $n$-Lie identity) if $n$ is even and an identity of $ω$-degree $3$ if $n$ is odd.

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