Masahiko Yoshinaga

• Visitor: Dmitry Kozlov (Bremen), 23-30 November 2025
• Visitor: Francesco Conti (Inria - CNR), 23-27 September 2025
• Preprint: (with Yukino Yagi) Reconstrucion of oriented matroids from Varchenko-Gelfand algebras arXiv:2509.19905
• Preprint: (with Paul Mucksch) Milnor fibrations and oriented matroids. arXiv:2508.15331
• 勉強会：組合せ論的ホッジ理論勉強会（第2回） ---Positive geometry, マトロイド, ねじれ交差形式--- (2026/03/27-29(Tentative), 大阪大学)
• Workshop: Algebraic Geometry, Topology, Combinatorics and Related Topics 2026 (AGTC2026) (2026/03/09-11, 大阪大学)
• Workshop: Magnitude 2025 (2026/12/22-24 (Tentative), 大阪大学)
• Workshop: Arrangements in Osaka 2025 (2025/12/15-19, 大阪大学)
• 勉強会：組合せ論的ホッジ理論勉強会（第1回） ---Adiprasito-Huh-Katz を読む--- (2025/09/24-26, 大阪大学)
• Workshop: One-day Workshop Artin group and related topics (17 May 2025, Kyoto U.)
• Workshop: Arrangement Days in Osaka (24-26 March 2025, Osaka U.)
• Preprint: (with Hirokazu Katsumasa, Emily Roff) Is magnitude 'generically continuous' for finite metric spaces? arXiv:2501.08745
• Workshop: AGTC 2025 (Tokushima) (Tokushima U, 6-8 March 2025)
• Workshop: Magnitude 2024 (Fukuoka) (Fukuoka, 8-9 January 2025)
• Preprint: (with Tongyu Nian, Shuhei Tsujie, Ryo Uchiumi) $q$-deformation of chromatic polynomials and graphical arrangements. arXiv:2412.08290
• Talk: Towards a Kontsevich-Zagier type conjecture for holonomic series. Algebraicity and Transcendence for Singular Differential Equations Erwin Schrodinger Institute Vienna October 7-19, 2024
• Running Order Seminar (2023/05/18)

• Logarithmic vector fields and freeness、
• Topology of hyperplane arrangements.
• Lattice points countings.
• Matroids and Tutte polynomials.
• Categorification of enumerative problems, magnitude homology of metric spaces

• cv
• Research Activity, Papers
• Talks (Not updated)
• Articles in Japanese (Japanese)
• Lectures (Japanese)