DLMF:26.16.E2 (Q7982)

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DLMF:26.16.E2
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    Defining formula
    ∑ σ ∈ 𝔖 S q inv ( σ ) = [ a 1 + a 2 + ⋯ + a n a 1 , a 2 , … , a n ] q , subscript 𝜎 set-of-permutations 𝑆 superscript 𝑞 inv 𝜎 q-multinomial subscript 𝑎 1 subscript 𝑎 2 ⋯ subscript 𝑎 𝑛 subscript 𝑎 1 subscript 𝑎 2 … subscript 𝑎 𝑛 𝑞 {\displaystyle{\displaystyle\sum_{\sigma\in\mathfrak{S}_{S}}q^{\mathop{\mathrm% {inv}}(\sigma)}=\genfrac{[}{]}{0.0pt}{}{a_{1}+a_{2}+\cdots+a_{n}}{a_{1},a_{2},% \ldots,a_{n}}_{q},}}
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    DLMF id
    DLMF:26.16.E2
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