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SUMMARY:Dominique Manchon (CNRS  & Université Clermont-Auvergne)
DTSTART:20210629T083500Z
DTEND:20210629T090500Z
DTSTAMP:20260423T010856Z
UID:JENTE/40
DESCRIPTION:Title: <a href="https://researchseminars.org/talk/JENTE/40/">A
 n infinitesimal bialgebra related to multiple polylogarithms and q-multipl
 e zeta values</a>\nby Dominique Manchon (CNRS  & Université Clermont-Auve
 rgne) as part of Japan Europe Number Theory Exchange Seminar\n\n\nAbstract
 \nMultiple polylogarithms as well as some models of q-multiple zeta values
  (e.g. the Ohno-Okuda-Zudilin model) make sense for integer arguments of a
 ny sign. They are encoded by words with three letters p\,d\,y subject to p
 d=dp=1. We describe a comultiplication on the linear span of these words\,
  which gives rise together with concatenation to an infinitesimal bialgebr
 a structure. Then we will explore the compatibility of this comultiplicati
 on with the mixed-sign versions of the shuffle product. Based on joint wor
 ks with J. Castillo-Medina\, K. Ebrahimi-Fard and J. Singer.\n
LOCATION:https://researchseminars.org/talk/JENTE/40/
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