Please note: my mail address [AT ma.noda.tus.ac.jp] will be discontinued. Please use another address to contact me.

Yuya MATSUMOTO

Mathematician. Working on arithmetic geometry and algebraic geometry, especially on K3 surfaces (in any characteristics). See Talks and Publications for more information.

Junior Associate Professor at Department of Mathematics, Faculty of Science and Technology, Tokyo University of Science (2023/04 –).
Office: 3rd floor, Building 4, Noda campus, Tokyo University of Science. (map of the campus.)
Postal address: Department of Mathematics, Faculty of Science and Technology, Tokyo University of Science, 2641 Yamazaki, Noda-shi, Chiba-ken, 278-8510, JAPAN.

Find me at: / arXiv / MathSciNet / zbMATH / KAKEN / ORCID / ResearchGate / researchmap

Talks

• Supersingular abelian surfaces in characteristic 2 and inseparable Kummer surfaces, Theory and Applications of Supersingular Curves and Supersingular Abelian Varieties, II, RIMS (Kyoto University), 2024/11/08.
• Inseparable Kummer surfaces, Japanese-European Symposium on Symplectic Varieties and Moduli Spaces - 8th Edition, RIMS (Kyoto University), 2024/09/20.
• 正標数の有理二重点について (in Japanese), 特異点と McKay 対応, Tokyo University of Science, 2024/07/18-19.
• Inseparable Kummer surfaces, Arithmetic Geometry, Algebraic Geometry and Analytic Geometry — celebrating Kazuhiro Fujiwara's 60th birthday, The University of Tokyo, 2024/07/02.
• 非分離Kummer曲面 (in Japanese), Algebraic Geometry Seminar, The University of Tokyo, 2024/05/17.

(see all talks)

Recent Publications and Preprints

• Inseparable Kummer surfaces, preprint arXiv:2403.02770 (2024/03/05)
• Supersingular reduction of Kummer surfaces in residue characteristic 2, preprint arXiv:2302.09535 (2023/02/21)
• with Christian Liedtke and Gebhard Martin, Isolated Quotient Singularities in Positive Characteristic, to appear in Astérisque. This consists of two preprints:
  • with Christian Liedtke and Gebhard Martin, Torsors over the Rational Double Points in Characteristic p, preprint arXiv:2110.03650 (2021/10/08)
  • with Christian Liedtke and Gebhard Martin, Linearly Reductive Quotient Singularities, preprint arXiv:2102.01067 (v2: 2021/10/12)
• Purely inseparable coverings of rational double points in positive characteristic, Journal of Singularities 24 (2022), 79–95. DOI: 10.5427/jsing.2022.24b (arXiv:2003.10344v3)
• Inseparable maps on W_n-valued Ext groups of non-taut rational double point singularities and the height of K3 surfaces, J. Commut. Algebra 15(3): 377-404 (Fall 2023). DOI: 10.1216/jca.2023.15.377 arXiv:1907.04686
• Canonical coverings of Enriques surfaces in characteristic 2, J. Math. Soc. Japan 74 (2022), no. 3, 849–872. DOI: 10.2969/jmsj/86318631 arXiv:1812.06914 (v3: 2021/01/31)
• μ_p- and α_p-actions on K3 surfaces in characteristic p, J. Algebraic Geom. 32 (2023), 271–322, DOI: 10.1090/jag/804 arXiv:1812.03466 (v5: 2021/01/31)
• On μ_n-actions on K3 surfaces in positive characteristic, Nagoya Mathematical Journal, 249 (2023), 11–49. , DOI: 10.1017/nmj.2022.20 arXiv:1710.07158 [poster for Kinosaki symposium] (v4: 2022/02/20)
• with Hisanori Ohashi and Sławomir Rams, On automorphisms of Enriques surfaces and their entropy, Mathematische Nachrichten 291 (2018), no. 13, 2084–2098. (arXiv:1707.02563)
• Degeneration of K3 surfaces with non-symplectic automorphisms, Rend. Sem. Mat. Univ. Padova 150 (2023), pp. 227–245, DOI: 10.4171/rsmup/123 (arXiv:1612.07569)
• Extendability of automorphisms of K3 surfaces, Mathematical Research Letters 30 (2023), no. 3, 821–863, DOI: 10.4310/MRL.2023.v30.n3.a9 (arXiv:1611.02092)
• with Christian Liedtke, Good reduction of K3 surfaces, Compositio Math. 154 (2018), 1–35. (arXiv:1411.4797v3)

(see all publications)

unofficial notes

a list of nearby conferences [no longer maintained].

Paris memo (2015/11/05): written in Japanese/French. No longer maintained.

(There are some other pages written only in Japanese. )