Together with Nils Matthes I organized the Japan Europe Number Theory Exchange Seminar.
Seminars, Conferences & Workshops
2022
Research stay at Max Planck Institute for Mathematics, August 2022.
Modular forms in number theory and beyond, Bielefeld University, August 2022.
Talk given: Formal quasimodular forms and formal multiple Eisenstein series
Research stay at Hamburg University, August 2022.
多重ゼータ値の諸相, RIMS Kyoto, May 2022.
Talk given: The zoo of multiple Eisenstein series.
第16回多重ゼータ研究集会, Online, February 2022.
The 15th Young Mathematicians Conference on Zeta Functions, Nagoya University, Online, February 2022.
Seminar arithmetische Geometrie und Zahlentheorie, Universität Hamburg, Online, January 2022.
Talk given: Connecting modular forms and multiple zeta values via combinatorial multiple Eisenstein series.
2021
Geometry, Arithmetic and Differential Equations of Periods (GADEPs), Online, October 2021.
Talk given: Finite multiple zeta values.
NU Mirai Education Project, Nagoya University, August & September 2021.
Lectures given: Polya's four step problem solving method & Mathematics in daily life and the wonderful(?) world of artificial intelligence
解析数論セミナー, Nagoya University, Online, July 2021.
Talk given: 多重ゼータ値のq類似および形式的な二重アイゼンシュタイン空間の実現.
関西多重ゼータ研究会第54回, Online, May 2021.
Talk given: Formal multiple Eisenstein series and formal multiple zeta values.
Seminar arithmetische Geometrie und Zahlentheorie, Online, May 2021.
Talk given: Formal multiple Eisenstein series.
2021 Waseda number theory Conference, Online, March 2021.
Talk given: Formal quasi-modular forms.
第15回多重ゼータ研究集会, Online, February 2021.
The 14th Young Mathematicians Conference on Zeta Functions, Nagoya University, Online, February 2021.
2020
ACPMS Seminar (Online), December 2020.
Talk given: A variant of the double shuffle relations and quasi modular forms.
2020年度第3回多元数理談話会 (Online), Nagoya University, December 2020.
Talk given: 多重ゼータ値とそのモジュラー形式との関係 (Multiple zeta values and their relationship to modular forms).
九大多重ゼータセミナー予定 (Online), Kyushu University, Fukuoka, May 2020.
Talk given: Multiple Eisenstein series and their Fourier coefficients.
第13回ゼータ若手研究集会, Toyama University, Toyama, February 2020.
第13回多重ゼータ研究集会, Kindai University, Osaka, February 2020.
Talk given: Combinatorial multiple Eisenstein series
Japan-Taiwan joint workshop on multiple zeta values, 沖縄県青年会館, Naha, Okinawa, February 2020.
Talk given: q-double zeta values and modular forms
九大多重ゼータセミナー予定, Kyushu University, Fukuoka, January 2020.
2 Talks given: Generalized double shuffle equations for (q-)multiple zeta values
2019
関西多重ゼータ研究会第４6回, Kyoto Sangyo University, Kyoto, December 2019.
Various Aspects of Multiple Zeta Values, RIMS, Kyoto, November 2019.
解析数論セミナー, Nagoya University, Nagoya, September 2019.
Talk given: Generalized double shuffle equations in depth two and quasi modular forms.
日本数学会2019年度秋季総合分科会, 金沢大学, Kanazawa, September 2019.
Talk given: 有限多重調和q級数の1のベキ根での値と有限および対称多重ゼータ値.
Research stay at Oxford University, August 2019.
Talk given: Multiple harmonic q-series at roots of unity and their connection to finite & symmetric multiple zeta values.
Research stay at Utrecht University, August 2019.
Research stay at Hamburg University, August 2019.
Research stay at Max Planck Institute for Mathematics, August 2019.
多重ゼータ研究集会, Kyushu University, Fukuoka, June 2019.
Talk given: Sum/Some formulas for Schur multiple zeta values.
関西多重ゼータ研究会第４5回, 大阪体育大学, Osaka, May 2019.
愛媛大学代数セミナー (Ehime Algebra Seminar), Ehime University, Matsuyama, April 2019.
Talk given: Multiple harmonic q-series at roots of unity and their connection to finite & symmetric multiple zeta values.
33rd Automorphic Forms Workshop, Duquesne University, Pittsburgh, March 2019.
Talk given: Modular forms and multiple zeta values.
第12回多重ゼータ研究集会 (12-th Multiple zeta values research meeting), Kindai University, Osaka, February 2019.
The 12th Young Mathematicians Conference on Zeta Functions, Nagoya University, Nagoya, February 2019.
Arithmetic and Algebraic Geometry 2019, The University of Tokyo, Tokyo, January 2019.
2018
17th IAR YLC Seminar, Nagoya University, Nagoya, December 2018.
Talk given: Numbers, infinite sums and multiple zeta values
Studium Generale Lecture, Nagoya University, Nagoya, December 2018.
Talk given: Numbers, infinite sums and their appearences in daily life
解析数論セミナー, Nagoya University, Nagoya, October 2018.
Talk given: Modular forms and q-analogues of modified double zeta values.
関西多重ゼータ研究会第４２回 Kyoto Sangyo University, Kyoto, September 2018.
Talk given: Modular forms and q-analogues of modified double zeta values.
九大多重ゼータセミナー
Kyushu University, Fukuoka, September 2018.
Talk given: Modular forms and q-analogues of modified double zeta values.
第26回整数論サマースクール「多重ゼータ値」 Irako Sea-Park & Spa, September 2018.
2018 Taiwan-Japan Joint Workshop on MZV’s, NCTS, Taipei, August 2018.
Profinite monodromy, Galois representations and Complex functions RIMS, Kyoto, May 2018.
Algebra seminar, Tohoku University, Sendai, May 2018.
Talk given: Multiple harmonic q-series at roots of unity and their connection to finite & symmetrized multiple zeta values.
解析数論セミナー, Nagoya Unversity, Nagoya, April 2018.
Talk given: Checkerboard style Schur multiple zeta values.
Periods in Number Theory, Algebraic Geometry and Physics, HIM, Bonn, Q1 2018.
Talk given: Multiple harmonic q-series at roots of unity and finite & symmetrized multiple zeta values.
2017
3rd Japanese-German Number Theory workshop, MPIM, Bonn, November 2017.
Seminar Aachen-Bonn-Köln-Lille-Siegen on Automorphic Forms, Universität zu Köln, October 2017.
Talk given: Multiple harmonic q-series at primitive roots of unity and finite multiple zeta values
CARMA (Algebraic Combinatorics, Resurgence, Moulds and Applications), CIRM, Luminy, June 2017.
Talk given: A simultaneous q-analogue of finite and symmetrized multiple zeta values.
Modular forms are everywhere, MPIM, Bonn, May 2017.
French-Japanese Zeta-Functions, Université Lille 1, Lille, March 2017.
第10回ゼータ若手研究集会 (The 10th Young Mathematicians Conference on Zeta Functions) Nagoya Unversity, Nagoya, February 2017.
Talk given: Cyclotomic analogues of finite multiple zeta values.
多重ゼータ研究集会 (Multiple zeta values research meeting) Kindai University, Osaka, February 2017.
Talk given: Derivatives of q-analogues of multiple zeta values.
解析数論セミナー, Nagoya Unversity, Nagoya, January 2017.
Talk given: Interpolated Schur multiple zeta values.
2016
Number Theory Seminar, Tokyo Metropolitan University, Toyko, December 2016.
Talk given: Interpolated Schur multiple zeta values.
九大多重ゼータセミナー
Kyushu University, Fukuoka, November 2016.
Talk given: Interpolated Schur multiple zeta values.
School on Mock Modular Forms and Related Topics, Kyushu University, Fukuoka, November 2016.
多重ゼータ値の諸相 - "Various aspects of multiple zeta values", RIMS, Kyoto, July 2016.
Talk given: The double shuffle structure of certain q-analogues of multiple zeta values and the connection to modular forms.
2015
"Jahrestagung der Deutschen Mathematiker-Vereinigung 2015", Uni Hamburg, September 2015.
Talk given: A combinatorial approach to classical modular forms inspired by multiple zeta values.
"Arbeitstagung 2015", MPIM Bonn, June 2015.
"Oberseminar Algebra und Geometrie", Uni Frankfurt, June 2015.
Talk given: Multiple zeta values and regularized multiple Eisenstein series.
"Automorphic forms: advances and applications", CIRM Marseille, May 2015.
"Resurgence, Physics and Numbers", Centro di Ricerca Matematica Ennio De Giorgi- Pisa, May 2015.
Talk given: Multiple zeta values and regularized multiple Eisenstein series.
"Spring School: Characters of Representations and Modular Forms", MPIM Bonn, March 2015.
"Forschungsseminar Arithmetische Geometrie", HU Berlin, February 2015.
Talk given: Multiple zeta values and multiple Eisenstein series.
2014
"Workshop on Multiple Zeta Values, Modular Forms and Elliptic Motives II", ICMAT Madrid, December 2014.
"Arithmetic of Eisenstein series", TU Darmstadt, September 2014.
"Student Conference on Automorphic Forms and Eisenstein Series", TU Darmstadt, September 2014.
Talk given: Shuffle regularized multiple Eisenstein series and the Goncharov coproduct.
"Numbers and Physics (NAP2014)", ICMAT Madrid, September 2014.
Talk given: Shuffle regularized multiple Eisenstein series and the Goncharov coproduct.
"Clay Mathematics Institute Summer School 2014: Periods and Motives: Feynman amplitudes in the 21st century", ICMAT Madrid, July 2014.
Talk given: Generating series of multiple divisor sums and other interesting q-series.
"Building Bridges: 2nd EU/US Summer School + Workshop on Automorphic Forms and Related Topics", University of Bristol, July 2014.
Talk given: Generating series of multiple divisor sums and other interesting q-series.
2013
九大整数論セミナー "Kyushu Number Theory seminar", Kyushu University, November 2013.
Talk given: Multiple divisor functions, their algebraic structure and the relation to multiple zeta values.
Talk given: Multiple Eisenstein series, their Fourier expansions and multiple divisor functions.
"Multiple Zeta Values, Multiple Polylogarithms and Quantum Field Theory", ICMAT Madrid, October 2013.
"Multiple zeta values in mathematics and physics" , Humboldt University Berlin, October 2013.
"European Science Foundation - Exploratory Workshop: New Approaches To Multiple Zeta Values ", ICMAT Madrid, September 2013.
Talk given: The algebra of multiple divisor functions and applications to multiple zeta values.
"Polylogarithms as a Bridge between Number Theory and Particle Physics", EPSRC Durham Symposium, July 2013.
"Feynman Graphs and Motives", SFB/TRR 45 Bonn-Essen-Mainz, March 2013.
"Automorphic Forms and L-Functions", TU Darmstadt, March 2013.
2012
"Amplitudes and Periods", IHÉS Paris, December 2012.
"Heilbronn Workshop on String Theory and Arithmetic Geometry", University of Bristol, September 2012.
Talk given: Multiple Eisenstein series.
"Building Bridges: 1st EU-US conference on Automorphic Forms and related topics", RWTH Aachen University, August 2012.
Talk given: Multiple Eisenstein series.
"Periods and Motives in Madrid - A Modern Perspective on Renormalization", ICMAT Madrid, July 2012.
Talk given: Multiple Eisenstein series.
"Quantum Field Theory, Periods and Polylogarithms III", Humboldt University Berlin, June 2012.
"Modular Forms, Mock Theta Functions, and Applications", University of Cologne, February 2012.
2011
"Workshop on Multiple Zeta Values, Modular Forms and Elliptic Motives", University of Bristol, May 2011.
2008-2016
"Seminar arithmetische Geometrie und Zahlentheorie", Uni Hamburg (15 talks given).
Research stay at Max Planck Institute for Mathematics, August 2022.
Modular forms in number theory and beyond, Bielefeld University, August 2022.Talk given: Formal quasimodular forms and formal multiple Eisenstein series
Research stay at Hamburg University, August 2022.
多重ゼータ値の諸相, RIMS Kyoto, May 2022.Talk given: The zoo of multiple Eisenstein series.
第16回多重ゼータ研究集会, Online, February 2022. The 15th Young Mathematicians Conference on Zeta Functions, Nagoya University, Online, February 2022. Seminar arithmetische Geometrie und Zahlentheorie, Universität Hamburg, Online, January 2022.Talk given: Connecting modular forms and multiple zeta values via combinatorial multiple Eisenstein series.
2021
Geometry, Arithmetic and Differential Equations of Periods (GADEPs), Online, October 2021.Talk given: Finite multiple zeta values.
NU Mirai Education Project, Nagoya University, August & September 2021.Lectures given: Polya's four step problem solving method & Mathematics in daily life and the wonderful(?) world of artificial intelligence
解析数論セミナー, Nagoya University, Online, July 2021.Talk given: 多重ゼータ値のq類似および形式的な二重アイゼンシュタイン空間の実現.
関西多重ゼータ研究会第54回, Online, May 2021.Talk given: Formal multiple Eisenstein series and formal multiple zeta values.
Seminar arithmetische Geometrie und Zahlentheorie, Online, May 2021.Talk given: Formal multiple Eisenstein series.
2021 Waseda number theory Conference, Online, March 2021.Talk given: Formal quasi-modular forms.
第15回多重ゼータ研究集会, Online, February 2021. The 14th Young Mathematicians Conference on Zeta Functions, Nagoya University, Online, February 2021.2020
ACPMS Seminar (Online), December 2020.Talk given: A variant of the double shuffle relations and quasi modular forms.
2020年度第3回多元数理談話会 (Online), Nagoya University, December 2020.Talk given: 多重ゼータ値とそのモジュラー形式との関係 (Multiple zeta values and their relationship to modular forms).
九大多重ゼータセミナー予定 (Online), Kyushu University, Fukuoka, May 2020.Talk given: Multiple Eisenstein series and their Fourier coefficients.
第13回ゼータ若手研究集会, Toyama University, Toyama, February 2020. 第13回多重ゼータ研究集会, Kindai University, Osaka, February 2020. Talk given: Combinatorial multiple Eisenstein series
Japan-Taiwan joint workshop on multiple zeta values, 沖縄県青年会館, Naha, Okinawa, February 2020.Talk given: q-double zeta values and modular forms
九大多重ゼータセミナー予定, Kyushu University, Fukuoka, January 2020.2 Talks given: Generalized double shuffle equations for (q-)multiple zeta values
2019
関西多重ゼータ研究会第４6回, Kyoto Sangyo University, Kyoto, December 2019. Various Aspects of Multiple Zeta Values, RIMS, Kyoto, November 2019. 解析数論セミナー, Nagoya University, Nagoya, September 2019.Talk given: Generalized double shuffle equations in depth two and quasi modular forms.
日本数学会2019年度秋季総合分科会, 金沢大学, Kanazawa, September 2019.Talk given: 有限多重調和q級数の1のベキ根での値と有限および対称多重ゼータ値.
Research stay at Oxford University, August 2019.Talk given: Multiple harmonic q-series at roots of unity and their connection to finite & symmetric multiple zeta values.
Research stay at Utrecht University, August 2019.
Research stay at Hamburg University, August 2019.
Research stay at Max Planck Institute for Mathematics, August 2019.
多重ゼータ研究集会, Kyushu University, Fukuoka, June 2019.Talk given: Sum/Some formulas for Schur multiple zeta values.
関西多重ゼータ研究会第４5回, 大阪体育大学, Osaka, May 2019. 愛媛大学代数セミナー (Ehime Algebra Seminar), Ehime University, Matsuyama, April 2019.Talk given: Multiple harmonic q-series at roots of unity and their connection to finite & symmetric multiple zeta values.
33rd Automorphic Forms Workshop, Duquesne University, Pittsburgh, March 2019.Talk given: Modular forms and multiple zeta values.
第12回多重ゼータ研究集会 (12-th Multiple zeta values research meeting), Kindai University, Osaka, February 2019. The 12th Young Mathematicians Conference on Zeta Functions, Nagoya University, Nagoya, February 2019. Arithmetic and Algebraic Geometry 2019, The University of Tokyo, Tokyo, January 2019.2018
17th IAR YLC Seminar, Nagoya University, Nagoya, December 2018.Talk given: Numbers, infinite sums and multiple zeta values
Studium Generale Lecture, Nagoya University, Nagoya, December 2018.Talk given: Numbers, infinite sums and their appearences in daily life
解析数論セミナー, Nagoya University, Nagoya, October 2018.Talk given: Modular forms and q-analogues of modified double zeta values.
関西多重ゼータ研究会第４２回 Kyoto Sangyo University, Kyoto, September 2018.Talk given: Modular forms and q-analogues of modified double zeta values.
九大多重ゼータセミナー
Kyushu University, Fukuoka, September 2018.Talk given: Modular forms and q-analogues of modified double zeta values.
第26回整数論サマースクール「多重ゼータ値」 Irako Sea-Park & Spa, September 2018.
2018 Taiwan-Japan Joint Workshop on MZV’s, NCTS, Taipei, August 2018.
Profinite monodromy, Galois representations and Complex functions RIMS, Kyoto, May 2018.
Algebra seminar, Tohoku University, Sendai, May 2018.Talk given: Multiple harmonic q-series at roots of unity and their connection to finite & symmetrized multiple zeta values.
解析数論セミナー, Nagoya Unversity, Nagoya, April 2018.Talk given: Checkerboard style Schur multiple zeta values.
Periods in Number Theory, Algebraic Geometry and Physics, HIM, Bonn, Q1 2018.Talk given: Multiple harmonic q-series at roots of unity and finite & symmetrized multiple zeta values.
2017
3rd Japanese-German Number Theory workshop, MPIM, Bonn, November 2017.
Seminar Aachen-Bonn-Köln-Lille-Siegen on Automorphic Forms, Universität zu Köln, October 2017.Talk given: Multiple harmonic q-series at primitive roots of unity and finite multiple zeta values
CARMA (Algebraic Combinatorics, Resurgence, Moulds and Applications), CIRM, Luminy, June 2017.Talk given: A simultaneous q-analogue of finite and symmetrized multiple zeta values.
Modular forms are everywhere, MPIM, Bonn, May 2017.
French-Japanese Zeta-Functions, Université Lille 1, Lille, March 2017.
第10回ゼータ若手研究集会 (The 10th Young Mathematicians Conference on Zeta Functions) Nagoya Unversity, Nagoya, February 2017.Talk given: Cyclotomic analogues of finite multiple zeta values.
多重ゼータ研究集会 (Multiple zeta values research meeting) Kindai University, Osaka, February 2017.Talk given: Derivatives of q-analogues of multiple zeta values.
解析数論セミナー, Nagoya Unversity, Nagoya, January 2017.Talk given: Interpolated Schur multiple zeta values.
2016
Number Theory Seminar, Tokyo Metropolitan University, Toyko, December 2016.Talk given: Interpolated Schur multiple zeta values.
九大多重ゼータセミナー
Kyushu University, Fukuoka, November 2016.Talk given: Interpolated Schur multiple zeta values.
School on Mock Modular Forms and Related Topics, Kyushu University, Fukuoka, November 2016.
多重ゼータ値の諸相 - "Various aspects of multiple zeta values", RIMS, Kyoto, July 2016.Talk given: The double shuffle structure of certain q-analogues of multiple zeta values and the connection to modular forms.
2015
"Jahrestagung der Deutschen Mathematiker-Vereinigung 2015", Uni Hamburg, September 2015.Talk given: A combinatorial approach to classical modular forms inspired by multiple zeta values.
"Arbeitstagung 2015", MPIM Bonn, June 2015.
"Oberseminar Algebra und Geometrie", Uni Frankfurt, June 2015.Talk given: Multiple zeta values and regularized multiple Eisenstein series.
"Automorphic forms: advances and applications", CIRM Marseille, May 2015.
"Resurgence, Physics and Numbers", Centro di Ricerca Matematica Ennio De Giorgi- Pisa, May 2015.Talk given: Multiple zeta values and regularized multiple Eisenstein series.
"Spring School: Characters of Representations and Modular Forms", MPIM Bonn, March 2015.
"Forschungsseminar Arithmetische Geometrie", HU Berlin, February 2015.Talk given: Multiple zeta values and multiple Eisenstein series.
2014
"Workshop on Multiple Zeta Values, Modular Forms and Elliptic Motives II", ICMAT Madrid, December 2014.
"Arithmetic of Eisenstein series", TU Darmstadt, September 2014.
"Student Conference on Automorphic Forms and Eisenstein Series", TU Darmstadt, September 2014.Talk given: Shuffle regularized multiple Eisenstein series and the Goncharov coproduct.
"Numbers and Physics (NAP2014)", ICMAT Madrid, September 2014.Talk given: Shuffle regularized multiple Eisenstein series and the Goncharov coproduct.
"Clay Mathematics Institute Summer School 2014: Periods and Motives: Feynman amplitudes in the 21st century", ICMAT Madrid, July 2014.Talk given: Generating series of multiple divisor sums and other interesting q-series.
"Building Bridges: 2nd EU/US Summer School + Workshop on Automorphic Forms and Related Topics", University of Bristol, July 2014.Talk given: Generating series of multiple divisor sums and other interesting q-series.
2013
九大整数論セミナー "Kyushu Number Theory seminar", Kyushu University, November 2013.Talk given: Multiple divisor functions, their algebraic structure and the relation to multiple zeta values.
Talk given: Multiple Eisenstein series, their Fourier expansions and multiple divisor functions.
"Multiple Zeta Values, Multiple Polylogarithms and Quantum Field Theory", ICMAT Madrid, October 2013.
"Multiple zeta values in mathematics and physics" , Humboldt University Berlin, October 2013.
"European Science Foundation - Exploratory Workshop: New Approaches To Multiple Zeta Values ", ICMAT Madrid, September 2013.Talk given: The algebra of multiple divisor functions and applications to multiple zeta values.
"Polylogarithms as a Bridge between Number Theory and Particle Physics", EPSRC Durham Symposium, July 2013.
"Feynman Graphs and Motives", SFB/TRR 45 Bonn-Essen-Mainz, March 2013.
"Automorphic Forms and L-Functions", TU Darmstadt, March 2013.
2012
"Amplitudes and Periods", IHÉS Paris, December 2012.
"Heilbronn Workshop on String Theory and Arithmetic Geometry", University of Bristol, September 2012.Talk given: Multiple Eisenstein series.
"Building Bridges: 1st EU-US conference on Automorphic Forms and related topics", RWTH Aachen University, August 2012.Talk given: Multiple Eisenstein series.
"Periods and Motives in Madrid - A Modern Perspective on Renormalization", ICMAT Madrid, July 2012.Talk given: Multiple Eisenstein series.
"Quantum Field Theory, Periods and Polylogarithms III", Humboldt University Berlin, June 2012.
"Modular Forms, Mock Theta Functions, and Applications", University of Cologne, February 2012.
2011
"Workshop on Multiple Zeta Values, Modular Forms and Elliptic Motives", University of Bristol, May 2011.
2008-2016
"Seminar arithmetische Geometrie und Zahlentheorie", Uni Hamburg (15 talks given).