Multiple Clausen and Glaisher values generated by shifted log-sine integrals

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For k,dZ0k,d\in\mathbb{Z}_{\geq 0}, define

Sk,do={πmSLs(k1,,kn)|m+k1++kn=k, dn0, n odd, m0, ki2},S^{o}_{k,d}=\left\{\pi^{m}\operatorname{SLs}(k_{1},\dots,k_{n})\mathrel{}\middle|\mathrel{}m+k_{1}+\dots+k_{n}=k,\ d\geq n\geq 0,\ n\text{ odd},\ m\geq 0,\ k_i\geq 2\right\}, Sk,de={πmSLs(k1,,kn)|m+k1++kn=k, dn0, n even, m0, ki2}.S^{e}_{k,d}=\left\{\pi^{m}\operatorname{SLs}(k_{1},\dots,k_{n})\mathrel{}\middle|\mathrel{}m+k_{1}+\dots+k_{n}=k,\ d\geq n\geq 0,\ n\text{ even},\ m\geq 0,\ k_i\geq 2\right\}.

Let Ck\mathcal{C}_k and Gk\mathcal{G}_k be the spaces spanned by multiple Clausen and multiple Glaisher values of weight kk, respectively. Generation conjecture for Clausen and Glaisher values. Every multiple Clausen value of weight kk and depth dd is a Q\mathbb{Q}-linear combination of elements of Sk,doS^{o}_{k,d}, and every multiple Glaisher value of weight kk and depth dd is a Q\mathbb{Q}-linear combination of elements of Sk,deS^{e}_{k,d}. The assertion is open.

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Primary source

Ryota Umezawa, “Evaluation of iterated log-sine integrals in terms of multiple polylogarithms”, arXiv:1912.07201 (2019).

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