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Future seminars
Seminar information archive ～09/03｜Today's seminar 09/04 | Future seminars 09/05～
2026/09/09
FJ-LMI Seminar
11:15-12:00 Room #056 (Graduate School of Math. Sci. Bldg.)
Léo BÉNARD (CNRS FJ-LMI)
Character varieties of knots, and the Reidemeister torsion function (英語)
https://fj-lmi.cnrs.fr/seminars
Léo BÉNARD (CNRS FJ-LMI)
Character varieties of knots, and the Reidemeister torsion function (英語)
[ Abstract ]
I will mainly motivate the study of Reidemeister torsion from a historical perspective, and highlight some recent related results and questions.
[ Reference URL ]I will mainly motivate the study of Reidemeister torsion from a historical perspective, and highlight some recent related results and questions.
https://fj-lmi.cnrs.fr/seminars
FJ-LMI Seminar
15:00-16:00 Room #126 (Graduate School of Math. Sci. Bldg.)
Warm Up Session of the Workshop on Polylogarithms
Herbert GANGL (Durham University)
Introduction to polylogarithms, with connections to number theory and algebraic $K$-theory (英語)
https://fj-lmi.cnrs.fr/wp-content/uploads/2026/09/Warm_up_session_schedule_and_abstracts.pdf
Warm Up Session of the Workshop on Polylogarithms
Herbert GANGL (Durham University)
Introduction to polylogarithms, with connections to number theory and algebraic $K$-theory (英語)
[ Abstract ]
In this survey talk we discuss several basic properties of classical polylogarithms
$$ \mathrm{Li}_m(z)=\sum_{k\geq1}\frac{z^k}{k^m}
$$
in the unit disc, for $m \geq 1$, leading up to a beautiful connection to the algebraic $K$-theory of number
fields, motivated by an attempt to find a suitable generalisation of Dirichlet’s celebrated class number
formula. Bloch initiated this for the dilogarithm, and Zagier extended it to higher polylogarithms. It
turns out that an arguably even more suitable class of functions to describe this connection involves
multiple polylogarithms (MPLs = nested sums of classical ones, in several variables $z_1, \ldots , z_d)$. If time
allows, we will also try to give a glimpse of Goncharov’s highly relevant “depth reduction conjecture”
for MPLs and what is known about it.
[ Reference URL ]In this survey talk we discuss several basic properties of classical polylogarithms
$$ \mathrm{Li}_m(z)=\sum_{k\geq1}\frac{z^k}{k^m}
$$
in the unit disc, for $m \geq 1$, leading up to a beautiful connection to the algebraic $K$-theory of number
fields, motivated by an attempt to find a suitable generalisation of Dirichlet’s celebrated class number
formula. Bloch initiated this for the dilogarithm, and Zagier extended it to higher polylogarithms. It
turns out that an arguably even more suitable class of functions to describe this connection involves
multiple polylogarithms (MPLs = nested sums of classical ones, in several variables $z_1, \ldots , z_d)$. If time
allows, we will also try to give a glimpse of Goncharov’s highly relevant “depth reduction conjecture”
for MPLs and what is known about it.
https://fj-lmi.cnrs.fr/wp-content/uploads/2026/09/Warm_up_session_schedule_and_abstracts.pdf
FJ-LMI Seminar
16:15-17:15 Room #126 (Graduate School of Math. Sci. Bldg.)
Warm Up Session of the Workshop on Polylogarithms
Luc PIRIO (CNRS FJ-LMI)
Polylogarithms and Webs
[ Reference URL ]
https://fj-lmi.cnrs.fr/wp-content/uploads/2026/09/Warm_up_session_schedule_and_abstracts.pdf
Warm Up Session of the Workshop on Polylogarithms
Luc PIRIO (CNRS FJ-LMI)
Polylogarithms and Webs
[ Reference URL ]
https://fj-lmi.cnrs.fr/wp-content/uploads/2026/09/Warm_up_session_schedule_and_abstracts.pdf
2026/09/10
Tokyo Probability Seminar
14:00-17:30 Room #126 (Graduate School of Math. Sci. Bldg.)
Lectures start earlier.
Sung-Soo Byun (Seoul National University) 14:00-15:30
TBA
Jacek Wesolowski (Warsaw University of Technology) 16:00-17:30
TBA
Lectures start earlier.
Sung-Soo Byun (Seoul National University) 14:00-15:30
TBA
Jacek Wesolowski (Warsaw University of Technology) 16:00-17:30
TBA
2026/10/19
Operator Algebra Seminars
15:30-17:00 Room # 126 (Graduate School of Math. Sci. Bldg.)
Xin-Hai Tong (The University of Tokyo)
Clustering Theorem for Bose--Hubbard class Gibbs states
Xin-Hai Tong (The University of Tokyo)
Clustering Theorem for Bose--Hubbard class Gibbs states
2026/12/07
Operator Algebra Seminars
15:30-17:00 Room # 126 (Graduate School of Math. Sci. Bldg.)
Akihiro Miyagawa (Kyoto University)
TBA
Akihiro Miyagawa (Kyoto University)
TBA
