Talks

On the homology classes defined by closed geodesics on the modular curve, Oberseminar, Max Planck Institute for Mathematics, March 20, 2025.
Geodesic cycles and Eisenstein classes for SL(2,Z), Number Theory Seminar, University of Oxford, December 19, 2024.
On the homology classes of SL(2,Z) defined by closed geodesics on the modular curve, Saga Souhatsu Mathematical Seminar, Saga University (Zoom), November 26, 2024.
Eisenstein classes and geodesic cycles for SL(2,Z), Arithmetic and Algebraic Geometry seminar, University of Amsterdam, October 23, 2024.
Eisenstein cocycles and special values of zeta functions, The 69th Symposium on Algebra, University of Tsukuba, August 26, 2024.
On the denominators of the special values of the partial zeta functions of real quadratic fields, International Seminar on Automorphic Forms, Zoom, June 11, 2024. [notes] [video]
The Shintani-Barnes cocycle and special values of zeta functions of algebraic number fields, Follow-Up-Workshop to "Periods in Physics, Number Theory and Algebraic Geometry," Hausdorff Research Institute for Mathematics, April 22, 2024.
On the denominators of the special values of the partial zeta functions of real quadratic fields, Arithmetic Study Group, Durham University, March 5, 2024.
On the denominators of the special values of the partial zeta functions of real quadratic fields, Number theory lunch seminar, Max Planck Institute for Mathematics, February 21, 2024.
Conical zeta values and special values of partial zeta functions of totally real fields, Eisenstein Days, University College London, December 18, 2023.
On the denominators of the special values of the partial zeta functions of real quadratic fields, Iwasawa theory and cohomology of arithmetic groups, Bielefeld University, November 28, 2023.
On the denominators of the special values of the partial zeta functions of real quadratic fields, The fifth Japan-Taiwan Number theory conference, National Penhu University of Science and Technology, August 24, 2023.
On the conical zeta values and the Dedekind zeta values for totally real fields, Number theory lunch seminar, Max Planck Institute for Mathematics, July 5, 2023.
Special values of zeta functions and the polylogarithms over totally real fields, YMC 2023, AP Ichigaya, March 13, 2023.
On the conical zeta values and the Dedekind zeta values for totally real fields, KKMZ Workshop, Kindai University, February 22, 2023.
On the conical zeta values and the Dedekind zeta values for totally real fields, Number theory seminar, Kyoto University, December 9, 2022.
The Hodge realization of the polylogarithm and the Shintani generating class for totally real fields, Tsuda University Number Theory Workshop 2022, Tsuda University, November 20, 2022.
On the conical zeta values and the Dedekind zeta values for totally real fields, 14th Fukuoka Symposium on Number Theory, Kyushu University, August 19, 2022.
On a cohomological interpretation of Hecke's integral formula and the special values of zeta functions, Ehime Algebra Seminar, Ehime University (Zoom), April 22, 2022.
On ``expansions'' of numbers and their periodicity, Project Workshop, Keio University (Zoom), March 16, 2022.
On some applications of an integral formula of Hurwitz, Japan Europe Number Theory Exchange Seminar, Zoom, November 2, 2021. [slides]
Shintani-Barnes cocycles and values of the zeta functions of algebraic number fields, Eisenstein series and equivariant cohomology, Universität Regensburg (Zoom), July 6, 2021. [video]
On the Shintani-Barnes cocycle and values of the zeta functions, Project Workshop, Keio University (Zoom), March 11, 2021.
A new construction of Eisenstein cocycle and the special values of Dedekind zeta functions, RIMS Workshop Algebraic Number Theory and Related Topics, Kyoto University (Zoom), December 1, 2020.
On a cohomological interpretation of the Hecke integral formula for general number fields, Friday Tea Time Zoom Seminar, Zoom, May 22, 2020.
The Hecke type integral formula and the Kronecker limit formula for the relative partial zeta function associated to an extension of number fields, Daisu Seminar, Kobe University, December 4, 2019.
Geodesic continued fractions and their periodicity, Kioicho Suri Seminar, Josai University, October 5, 2019.
The Hecke integral formula and the Kronecker limit formula for an extension of number fields, Regulators in Niseko 2019, Hilton Niseko Village, Hokkaido, September 10, 2019.
The Hecke type integral formula and the Kronecker limit formula for the relative partial zeta function associated to an extension of number fields, PVS seminar, Waseda University, May 25, 2019.
On the geodesic continued fraction and its periodicity, Diophantine Analysis and Related Fields 2019, University of Tsukuba, March 8, 2019.
On the Hecke type integral formula and the Kronecker limit formula for the relative partial zeta function associated to an extension of number fields, Functional equations on complex domains and related topics, Hiroshima University, March 5, 2019.
Geodesic continued fraction for Shimura curves and its periodicity, The 17th Hokuriku Number Theory Workshop, Kanazawa University, December 27, 2018.
Geodesic continued fraction on Shimura curves, The 12th Workshop on special varieties at Tambara, Tambara Institute of Mathematical Sciences, The University of Tokyo, September 17, 2018.
On the periodicity of geodesic continued fractions, Hausdorff Trimester Program Periods in Number Theory, Algebraic Geometry and Physics, Trimester Seminar/MPIM Number theory lunch seminar, Max Planck Institute for Mathematics, March 7, 2018.
Hecke's integral formula and Kronecker's limit formula for an arbitrary extension of number fields, Hausdorff Trimester Program Periods in Number Theory, Algebraic Geometry and Physics, Trimester Seminar/MPIM Number theory lunch seminar, Max Planck Institute for Mathematics, March 7, 2018.
Relative Hecke's integral formula for an arbitrary extension of number fields, The 11th Workshop on special varieties at Tambara, Tambara Institute of Mathematical Sciences, The University of Tokyo, September 21, 2017.
On generalization of Hecke's integral formula---from a view point of geodesic continued fractions, The 10th Young Mathematicians Conference on Zeta Functions, Graduate School of Mathematics, Nagoya University, February 21, 2017.
On periodicity of geodesic continued fractions, RIMS Workshop Algebraic Number Theory and Related Topics 2016, RIMS, Kyoto University, November 29, 2016.
On periodicity of geodesic continued fractions, Number theory seminar, Waseda University, November 18, 2016.
On periodicity of geodesic continued fractions, 15th Sendai-Hiroshima Workshop on Number theory, Tohoku University, July 13, 2016.
On periodicity of geodesic continued fractions, Number theory seminar, the University of Tokyo, April 20, 2016.
On periodicity of geodesic continued fractions, The 13th Kinosaki Freshman Seminar, Kinosaki, February 19, 2016.

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