Steven Charlton

Activities

Upcoming activities

  1. Nothing planned...

Outreach / Diversity 🌈

  1. Queer Lunch Dinner at MPIM (organised with A. Ray) 7 Nov 2024 Bonn, Germany Social meetup for the Queer Mathematicians in Bonn
  2. Maths with Pride (organised by student council) June 2024 Universität Bonn, Bonn, Germany I participated in this community event organised by the LGBT+ department of the student council of Uni Bonn Maths Institute, focusing on the experiences of being queer in mathematics.
  3. Queer Lunch at MPIM (Organised with A. Ray, I. Sundberg, K. Wehrheim) 30 Jan 2024 Max Planck Institute for Mathematics (MPIM), Bonn, Germany Social meetup for the Queer Mathematicians in Bonn
  4. Tag der offenen Tür - Max-Planck-Tag (Open Day) September 2018 Max Planck Institute for Mathematics (MPIM), Bonn, Germany Open day, giving a taste of what mathematicians do, and what mathematics research involves for the general public. I gave a mini-talk on the mathematics of twisty puzzles.
  5. Celebrate Science Festival October 2015 Durham University, Durham, UK Outreach programme during school half-term holidays, for 7-11 year olds and their families, with engaging exhibits and demonstrations. I was involved with the Mathematics Department's stand on 'The Cool Shapes of Viruses'.

Past activities

  1. School on Exponential Motives 21 September -- 25 September 2026 Universität Duisburg-Essen, Essen, Germany
  2. Bootstrap Approaches to Scattering Amplitudes 14 September -- 18 September 2026 Bethe Center for Theoretical Physics, Bonn, Germany
  3. 第五届多重zeta值及相关领域研讨会 The 5th Workshop on Multiple Zeta Values and Related Fields 27 July - 31 July, 2026 Zoom talk (Central South University 中南大学, Changsha, Hunan Province, China) Talk: Multiple \(t\) values of maximal height
  4. ChaBONNty conference 29 June -- 3 July 2026 Max Planck Institute for Mathematics, Bonn, Germany
  5. \(\operatorname{Spec}(\overline{\mathbb{Q}}(\zeta(3)))\) (2SLGBTQI voices in algebraic geometry, arithmetic geometry, commutative algebra, and number theory) 22 June -- 25 June 2026 Fields Institute, Toronto, Canada Speed talk (~5 minute): Multiple zeta values and modular forms
  6. Sixth International Workshop on Zeta Functions in Algebra and Geometry 8 Jun -- 12 Jun 2026 University of Galway, Galway, Ireland
  7. Research Visit to Annika Burmester, Abhiram Kidambi, Felix Lotter, Rosa Preiß 2 Mar -- 4 Mar 2026 Max Planck Institute for Mathematics in the Sciences (MPI-MIS), Leipzig, Germany
  8. Symbology@15 Conference 15 Dec -- 18 Dec 2025 Max Planck Institute for Physics, Garching (bei München), Germany Speed talk (1 minute): Multiple polylogarithms in weight 6
  9. Research Visit to Danylo Radchenko 17 Nov -- 19 Nov 2025 Laboratoire Paul Painlevé, University of Lille, Villeneuve d’Ascq, France
  10. Combinatorics and Arithmetic for Physics: special days 20 Nov -- 21 Nov 2025 Institut des Hautes Études Scientifiques (IHES), Bures-sur-Yvette, France
  11. Kickoff Meeting DFG Research Unit: Modern Foundations of Scattering Amplitudes 5 Nov -- 7 Nov 2025 Bethe Center for Theoretical Physics, Bonn, Germany
  12. Research Visit to Mike Daas 27 Oct -- 29 Oct 2025 University of Luxembourg, Luxembourg Seminar talk: Dedekind Zeta Values, Zagier's Polylogarithm Conjecture and depth reductions for multiple polylogarithms
  13. Elliptics and Beyond '25 1 Sep –- 5 Sep 2025 Bethe Center for Theoretical Physics, Bonn, Germany
  14. Conference in Memory of Yuri Manin 11 Aug –- 15 Aug 2025 Max Planck Institute for Mathematics (MPIM), Bonn, Germany
  15. Queer and Trans Mathematicians in Algebra and Representation Theory (QTMART) 23 Jul –- 25 Jul 2025 Mathezentrum, Universität Bonn, Bonn, Germany (Limited attendance, focusing on queer sessions)
  16. Progress and Emergent Theories in Zeta and L-Functions (PRETZL) 21 Jul –- 25 Jul 2025 Max Planck Institute for Mathematics, Bonn, Germany
  17. 30th Applications of Computer Algebra - ACA 2025 14 Jul –- 18 Jul 2025 Cultural Conference Center of Heraklion, Heraklion, Crete, Greece Speaker, special session on "Noncommutative Symbolic Computation", talk: Goncharov's programme, and symmetries of weight 6 multiple polylogarithms
  18. Queer in Math Day 2025 11 Jun 2025 Max Planck Institute for Mathematics in the Sciences (MPI-MIS), Leipzig, Germany Speed talk: Multiple zeta values and modular forms
  19. Polylogarithms, homology of linear groups, and Steinberg modules 8 Jun -- 13 Jun 2025 SwissMap Research Station, Les Diableret, Switzerland Invited Participant, talk: Depth reductions of multiple polylogarithms
  20. Quantum Topology 12 May -- 16 May 2025 Max Planck Institute for Mathematics (MPIM), Bonn, Germany
  21. Asymptotic Counting and L-Functions 5 May -- 9 May 2025 Max Planck Institute for Mathematics (MPIM), Bonn, Germany Speed talk: Multiple zeta values and modular forms
  22. Research Visit to Annika Burmester 20 Mar -- 21 Mar 2025 Nagoya University 名古屋大学, Nagoya, Japan
  23. Research Visit to Nobuo Sato 03 Mar -- 16 Mar 2025 National Taiwan University 國立臺灣大學, Taipei, Taiwan Seminar talk: Goncharov's programme and depth reductions of multiple polylogarithms
  24. Research Visit to Henrik Bachmann 26 Feb -- 02 Mar 2025 Nagoya University 名古屋大学, Nagoya, Japan Seminar talk: Symmetries of multiple \( t \) values. (Parity theorems a la Goncharov.)
  25. Research Visit to Koji Tasaka 24 Feb -- 25 Mar 2025 Kindai University 近畿大学, Osaka, Japan
  26. Modular Forms and Multiple Zeta Values (Kaneko's 60+4th Birthday) 17 Feb -- 22 Feb 2025 Kindai University 近畿大学, Osaka, Japan Invited participant
  27. The 17th MSJ-SI: Developments of multiple zeta values 10 Feb -- 15 Feb 2025 Kyushu University 九州大学, Fukuoka, Japan Invited participant
  28. The Mathematics of Post-Quantum Cryptography 04 Dec -- 05 Dec 2024 Max Planck Institute for Mathematics (MPIM), Bonn, Germany (Limited participation)
  29. Fishnets: Conformal Field Theories and Feynman Graphs 02 Sep -- 06 Sep 2024 Bethe Center for theoretical Physics, Bonn, Germany (Limited participation)
  30. Beyond Multiple Zeta Values: finite versions, q-analogues, and multiple Eisenstein series 27 Aug -- 29 Aug 2024 Universität Hamburg, Hamburg, Germany Invited speaker. Talk: Depth reductions of multiple polylogarithms in weight 6 Short talk: Depth 2 polylogs and high level coloured MZV's
  31. Combinatorics, Resurgence and Algebraic Geometry in Quantum Field Theory 19 Aug -- 23 Aug 2024 Max Planck Institute for Mathematics (MPIM), Bonn, Germany
  32. \( \operatorname{Spec}(\overline{\mathbb{Q}}(2 \pi \mathrm{i})) \) (LGBT+ voices in algebra, geometry and number theory) 18 Jun -- 21 Jun 2024 Fields Institute, Toronto, Canada Speaker. Talk:Goncharov's programme and depth reductions of multiple polylogarithms
  33. Follow-up workshop to "Periods" Trimester 22 Apr -- 26 Apr 2024 Hausdorf Research Institute for Mathematics (HIM), Bonn, Germany Invited speaker. Talk: Depth reductions of multiple polylogarithms
  34. International Conference on Modular Forms and q-Series 11 Mar -- 15 Mar 2024 Universität zu Köln, Cologne, Germany
  35. Mathematical Aspects of \(N{=}4\) Super-Yang-Mills Theory 26 Feb -- 1 Mar 2024 Simons Center, Stony Brook, NY, USA Invited speaker. Talk: Symmmetries of weight 6 MPL's and Goncharov's Depth Cocnjecture
  36. Research visit to Daniil Rudenko 5 Nov -- 14 Nov 2023 University of Chicago, Chicago, IL, US
  37. Polylogarithms, Cluster Algebras, and Scattering Amplitudes 11 Sep -- 15 Sep 2023 Brin Mathematics Research Center (BMRC), University of Maryland, MD, USA Invited speaker. Talk: New Polylogarithm Depth Reductions in Weight 5 and 6
  38. Research visit to Christian Zickert 12 Jul -- 26 Jul 2023 Brin Mathematics Research Center (BMRC), University of Maryland, MD, USA REU talk: Depth reductions of multiple polylogarithms: expectations, techniques, approaches
  39. Geometries and Special Functions for Physics and Mathematics 20 Mar -- 24 Mar 2023 Bethe Center for Theoretical Physics (BCTP), Bonn, Germany Short talk: The usefulness of two-one formulas
  40. Mathematical Structures in Feynman Integrals 13 Feb -- 16 Feb 2023 Universität Siegen, Siegen, Germany
  41. \(\mathbb{N}^3\)-days XVII 14 Oct -- 15 Oct 2022 Universität Hamburg, Hamburg, Germany
  42. Mathematical physics: algebraic cycles, strings and amplitudes 19 July -- 22 July 2022 Isaac Newton Institute (INI), Cambridge, UK
  43. Research visit to \(K\)-theory, algebraic cycles and motivic homotopy theory 18 July -- 29 July 2022 Isaac Newton Institute (INI), Cambridge, UK Invited researcher
  44. Point Configurations: Deformations and Rigidity 27 June -- 1 July 2022 University College London (UCL), London, UK Teaching assistant for D. Radchenko's "Modular forms" minicourse Talk: Multiple zeta values and modular forms
  45. Special Values of L-functions, Periods, and Fundamental Groups 27 June -- 28 June 2022 All Souls College, Oxford University, Oxford, UK
  46. Arithmetic geometry, cycles, Hodge theory, regulators, periods and heights 20 -- 24 June 2022 Isaac Newton Institute (INI), Cambridge, UK Speaker. Talk: Zagier's polylogarithm conjecture and an explicit 4-ratio
  47. Motives and Arithmetic Groups 13 -- 17 June 2022 Institut de Recherche Mathématique Avancée (IRMA), Strasbourg, France Speaker. Talks: Functional equations for Nielsen polylogarithms
  48. Research visit to Lynn and Sebastian Heller 16 -- 18 February 2022 Leibniz Universität Hannover, Hannover, Germany
  49. Research visit to Danylo Radchenko 16 -- 23 Dec 2021 Eidgenössische Technische Hochschule (ETH) Zürich, Zürich, Switzerland
  50. Research visit to Lynn and Sebastian Heller 09 -- 10 Dec 2021 Leibniz Universität Hannover, Hannover, Germany
  51. Amplitudes 2021 16 -- 20 August 2021 Zoom (Niels Bohr Institute, Copenhagen, Denmark)
  52. Y-RANT: Young Researchers in Algebraic Number Theory 2021 18 August -- 20 August 2021 Zoom (Heilbron Institute, Bristol, UK)
  53. \(\mathbb{N}^3\)-days XIV 28 May -- 29 May 2021 Zoom (Uppsala University, Uppsala, Sweden)
  54. Rendez-vous on Special Values and Periods 19 May -- 21 May 2021 Zoom (École normale supérieure (ENS) de Lyon, Lyon, France)
  55. The amplituhedron: algebra, combinatorics, and physics 8 April 2021 Zoom (Norges teknisk-naturvitenskapelige universitet / Norwegian University of Science and Technology (NTNU), Trondheim, Norway)
  56. Geomplitudes 8 February -- 16 February 2021 Zoom (Center for Quantum Mathematics and Physics (QMAP), UC Davis, Davis, CA, USA)
  57. \(\mathbb{N}^3\)-days XIII 26 November -- 27 November 2020 Zoom (Københavns Universitet, Copenhagen Denmark)
  58. Algebraic Structures in Perturbative Quantum Field Theory 16 November -- 20 November 2020 Zoom (Institut des Hautes Études Scientifiques (IHES), Bures-sur-Yvette, France)
  59. Geomplitudes 15 September -- 16 November 2020 Zoom (Center for Quantum Mathematics and Physics (QMAP), UC Davis, Davis, CA, USA)
  60. Elliptics and beyond 7 September -- 11 November 2020 Zoom (CERN TH-Department, Geneve, Switzerland; Niels Bohr Institute, Copenhagen, Denmark; Mainz Institute for Theoretical Physics (MITP), Mainz, Germany)
  61. Cluster Algebras and the Geometry of Scattering Amplitudes 2 -- 6 March 2020 Higgs Centre for Theoretical Physics, University of Edinburgh, Edinbirgh, UK Speaker. Talk: Cluster polylogarithms and identitie
  62. Introductory workshop of \(K\)-theory programme 13 January -- 17 January 2020 Isaac Newton Institute (INI), Cambridge, UK
  63. Research visit to \(K\)-theory, algebraic cycles and motivic homotopy theory January -- February 2020 Isaac Newton Institute (INI), Cambridge, UK Invited Researcher
  64. Periods and motives 8 July -- 12 July 2019 Humbolt Universität, Berlin, Germany
  65. Masterclass: Elliptic motives 20 May -- 24 May 2019 Stockholm University (SU) and Königliche Technische Hochschule / Royal Institute of Technology, Stockholm (KTH), Sweden
  66. Workshop for "Modular forms, periods and scattering amplitudes" 1 April -- 12 April 2019 Institute for Theoretical Studies, Eidgenössische Technische Hochschule (ETH) Zürich, Zürich, Switzerland Speaker. Talk Clean single-valued multiple polylogarithms
  67. School for "Modular forms, periods and scattering amplitudes" 11 February -- 15 February 2019 Institute for Theoretical Studies, Eidgenössische Technische Hochschule (ETH) Zürich, Zürich, Switzerland
  68. Elementare und Analytische Zahlentheorie (ELAZ) 3 September -- 9 September 2018 Max Planck Institute for Mathematics (MPIM), Bonn, Germany Speed talk: MZV's speed talk
  69. Homotopy theory and arithmetic geometry: motivic and diophantine aspects 9 July -- 13 July 2018 Imperial College, London, UK
  70. Workshop: Picard-Fuchs Equations and Hypergeometric Motives of the Periods Trimester 26 March -- 29 March 2018 Hausdorff Research Institute for Mathematics (HIM), Bonn, Germany
  71. Workshop: Amplitudes and Periods of the Periods Trimester 26 February -- 1 March 2018 Hausdorff Research Institute for Mathematics (HIM), Bonn, Germany
  72. MZV Days at the Periods Trimester 29 January -- 30 January 2018 Hausdorff Research Institute for Mathematics (HIM), Bonn, Germany Talks: Bowman-Bradley type identities for symmetrised MZV's
  73. Workshop: Periods, and Regulators of the Periods Trimester 15 January -- 19 January 2018 Hausdorff Research Institute for Mathematics (HIM), Bonn, Germany Talk: Motivic MZV's and the cyclic insertion conjecture
  74. Winter School of the Periods Trimester 9 January -- 10 January Hausdorff Research Institute for Mathematics (HIM), Bonn, Germany
  75. Research visit to Periods in Number Theory, Algebraic Geometry and Physics Trimester 2 January -- 20 April 2018 Hausdorff Research Institute for Mathematics (HIM), Bonn, Germany New HIM page for the past trimester Info blog for the trimester Calendar of the events
  76. 38th Kansai Multiple zeta seminar 9 December 2017 Osaka Institute of Technology 大阪工業大学, Osaka, Japan
  77. Algebraic Number Theory and Related Topics 2017 4 December -- 8 December 2017 Research Institute for Mathematical Sciences (RIMS), Kyoto University 京都大学, Kyoto, Japan
  78. Polylogs, multiple zetas and related topics 11 November -- 12 November 2017 Tohoku Forum for Creativity, Tohoku University 東北大学, Sendai, Japan Invited speaker: Talk Relating MPL's in weight \( \geq 5 \)
  79. Research visit to Multiple Zeta Value Research Center 1 October -- 17 December 2017 Multiple Zeta Value Research Centre, Kyushu University 九州大学, Fukuoka, Japan
  80. Motives for Periods Summer School 28 August -- 1 September 2017 Freie Universität, Berlin, Germany
  81. Algebraic \(K\)-Theory and Arithmetic 21 August -- 25 August 2017 Polish Academy of Sciences Conference Center, Będlewo
  82. Amplitudes 2017 10 July -- 14 July 2017 Higgs Centre for Theoretical Physics, University of Edinburgh, Edinbirgh, UK
  83. The elliptic/missing Feynman integrals 5 June -- 9 June 2017 Institute of Theoretical Physics, Eidgenössische Technische Hochschule (ETH) Zürich, Zürich, Switzerland
  84. British Mathematical Colloquium 2017 3 April -- 6 April 2017 Durham University, Durham, UK Invited speaker: Number Theory track. Talk: Motives and multiple zeta values
  85. Hot Topics: Galois Theory of Periods and Applications 27 March -- 31 March 2017 Mathematical Sciences Research Institute (MSRI), Berkeley, CA, USA
  86. French-Japanese zeta functions 13 March -- 17 March 2017 Laboratoire Paul Painlevé, Université Lille 1, Villeneuve D'Ascq, France
  87. 6th Atelier PARI/GP 11 January -- 15 January 2016 Institut Fourier, Université Grenoble Alpes, France
  88. Research visit to Research Trimester on Multiple Zeta Values, Multiple Polylogarithms, and Quantum Field Theory 5 November -- 15 November 2014 Instituto de Ciencias Matemáticas (ICMAT), Madrid, Spain Invited researcher. Seminar talk: The coproduct on multiple zeta values, and `almost' identities
  89. Young Researchers in Mathematics 2014 30 June -- 3 July 2014 Warwick University, Coventry, UK
  90. LMS 98: Polyloarithms as a Bridge Between Number Theory and Particle Physics 3 July -- 12 July 2013 Durham University, Durham, UK
  91. Grothendeick-Teichmüller Groups, Deformations and Operads Individuals days, January -- March 2013 Isaac Newton Institute (INI), Cambridge, UK