SK - Talks

Shinya Kumashiro

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Talks

    2025

  1. Canonical traces of graded fiber products: applications to disconnected Stanley--Reisner rings
    MSJ Spring Meeting 2026 at Tokyo University of Science (Tokyo, Japan), 23-26 March
  2. Canonical traces of graded fiber products: applications to disconnected Stanley-Reisner rings
    第２回新潟若手代数・幾何シンポジウム (Niigata, Japan), 26-29 November
  3. A note on modules with minimal multiplicity
    The 46th Japan Symposium on Commutative Algebra (Osaka, Japan), 20-24 November
  4. On partial trace ideals
    東京可換環論セミナー (online), 30 October
  5. 局所環のHilbert関数解析
    第29回代数学若手研究会 (Osaka, Japan), 11 March - 14 March

    2024

  6. Traces of semi-invariants
    Interactions of Commutative algebra, Representation theory, and Combinatorics in Bangkok (Bangkok, Thailand), 29 October - 1 November
  7. fiber coneのHilbert関数について
    東京可換環論セミナー (online), 4 October
  8. When are trace ideals finite?
    日本数学会2024年度秋季総合分科会 (Osaka, Japan), 3-6 September

    2023

  9. Graded filtrations and ideals of reduction number two
    Mini workshop on commutative algebra (Thai Nguyen, Vietnam), 21 September
  10. Rings having a finite number of trace ideals
    The 28th National School on Algebra (Bucharest, Romania), 24-28 June
  11. Study on Z_2 graded rings
    Workshop The 11th Japan-Vietnam Joint seminar on Commutative Algebra, by and for young mathematicians (Hanoi, Vietnam), 28-30 March

    2022

  12. 正準加群のトレースのcolengthの上限
    日本数学会2022年度秋季総合分科会 (Hokkaido, Japan), 13-16 September
  13. Certain monomial ideals whose numbers of generators of powers descend
    第3回情報数理セミナー (Ibaraki, Japan), 17-19 August
  14. 次数付フィルトレーションと節減数2のイデアル
    日本数学会2022年度年会 (online), 28 March
  15. When are trace ideals finite?
    第2回情報数理セミナー (Tochigi, Japan), 5-7 March
  16. Graded Bourbaki ideals of graded modules and Ideals of reduction number two
    Virtual Commutative Algebra Seminars (online), 28 January

    2021

  17. Graded filtrations and ideals of reduction number two
    第42回可換環論シンポジウム (online), 20-23 November
  18. Graded filtrations and ideals of reduction number two
    第1回情報数理セミナー (Tochigi, Japan), 23-24 October
  19. Graded Bourbaki ideals of graded modules
    オンライン可換環論セミナー2021 (online), 26-27 June and 10-11 July
  20. 節減数２のイデアルのHilbert関数挙動
    日本数学会2021年度年会 (online), 15-18 March
  21. 節減数２のイデアルのHilbert関数挙動
    The 17th Mathematics Conference for Young Researchers (online), 2-5 March

    2020

  22. Ideals of reduction number two
    可換環論オンラインワークショップ (online), 21-23 November
  23. The Auslander-Reiten conjecture for certain non-Gorenstein Cohen-Macaulay rings
    2020 AMS Fall Virtual Sectional Meetings, Special Session on Homological Methods in Algebra (online), 3-4 October
  24. The Auslander-Reiten conjecture for certain non-Gorenstein Cohen-Macaulay rings (research talk)
    WVU Algebra Seminar via Zoom (online), 12 September
  25. The Auslander-Reiten conjecture for certain non-Gorenstein Cohen-Macaulay rings (introductory talk)
    WVU Algebra Seminar via Zoom (online), 5 September
  26. Graded Bourbaki ideals of graded modules
    東京可換環論セミナー (online), 22 June
  27. Hilbert coefficients of ideals whose reduction numbers are two
    Seminarul de Algebră Comutativă Nicolae Radu (Bucharest, Romania), 4 February

    2019

  28. 非Gorenstein環におけるAuslander-Reiten予想
    MSJ Autumn Meeting 2019, at Kanazawa University (Ishikawa, Japan), 17-20 September
  29. The Auslander-Reiten conjecture for non-Gorenstein rings
    The 8th China - Japan - Korea International Symposium on Ring Theory (Aichi, Japan), 26-31 August
  30. Local cohomology of affine semigroup rings, part 2
    第16回可換環論サマースクール (Chiba, Japan), 5-8 August
  31. Local cohomology of affine semigroup rings, part 1
    第16回可換環論サマースクール (Chiba, Japan), 5-8 August
  32. Auslander-Reiten予想とUlrichイデアル
    第32回可換環論セミナー (Aomori, Japan), 27-30 June
  33. The Auslander-Reiten conjecture for non-Gorenstein Cohen-Macaulay rings
    Conference on Commutative Algebra and its Interaction with Algebraic Geometry In Honor of Bernd Ulrich (Indiana, USA), 16-21 June
  34. イデアル化のCohen-Macaulay型とresidually faithful加群について
    The 15th Mathematics Conference for Young Researchers (Hokkaido, Japan), 4-7 March
  35. Residually faithful modules and the Cohen-Macaulay type of idealizations
    第24回代数学若手研究会 (Tokyo, Japan), 18-21 February
  36. Residually faithful modules and the Cohen-Macaulay type of idealizations
    A Mini-Workshop on Commutative Algebra (Thai Nguyen, Vietnam), 6 January

    2018

  37. The structure of chains of Ulrich ideals in Cohen-Macaulay local rings of dimension one
    The 40th Japan Symposium on Commutative Algebra (Kanagawa, Japan), 22-26 November
  38. Residually faithful modules and the Cohen-Macaulay type of idealizations
    The 40th Japan Symposium on Commutative Algebra (Kanagawa, Japan), 22-26 November
  39. トレース加群からみたGorenstein性の解析
    MSJ Autumn Meeting 2018, at Okayama University (Okayama, Japan), 24-27 September
  40. The structure of chains of Ulrich ideals in Cohen-Macaulay local rings of dimension one
    MSJ Autumn Meeting 2018, at Okayama University (Okayama, Japan), 24-27 September
  41. Some categories of maximal Cohen-Macaulay modules and idealizations
    The 10th Japan-Vietnam joint seminar on commutative algebra (Hue, Vietnam), 10-14 September
  42. Infinite free resolutions, part 2
    第15回可換環論サマースクール (Aichi, Japan), 27-30 August
  43. Infinite free resolutions, part 1
    第15回可換環論サマースクール (Aichi, Japan), 27-30 August
  44. トレースイデアルを用いたゴレンシュタイン性の解析 Ⅱ
    第25回大和郡山セミナー (Nara, Japan), 2-3 July
  45. トレースイデアルを用いたゴレンシュタイン性の解析 Ⅰ
    第25回大和郡山セミナー (Nara, Japan), 2-3 July
  46. Residually faithful modules and the Cohen-Macaulay type of idealizations
    第31回可換環論セミナー (Kyoto, Japan), 27-30 June
  47. On GGL rings
    Mini-workshop on Commutative Algebra –by and for young mathematicians- (Hokkaido, Japan), 26-28 March
  48. Characterization of generalized Gorenstein rings
    MSJ Spring Meeting 2018 at The University of Tokyo (Tokyo, Japan), 18-21 March
  49. イデアル化R⋉Iのalmost Gorenstein性
    MSJ Spring Meeting 2018 at The University of Tokyo (Tokyo, Japan), 18-21 March
  50. A characterization of the Gorenstein property in terms of trace ideals
    第23回代数学若手研究会 (Osaka, Japan), 5-8 March
  51. A characterization of the Gorenstein property in terms of trace ideals
    第30回可換環論セミナー (Hokkaido, Japan), 31 January -2 February
  52. A characterization of the Gorenstein property in terms of trace ideals
    International workshop on commutative algebra by and for young mathematicians (Thai Nguyen, Vietnam), 17-21 January

    2017

  53. Ubiquity of Ulrich ideals in dimension one
    The 39th Japan Symposium on Commutative Algebra (Kyoto, Japan), 13-17 November
  54. Ulrich ideals and G-regular rings
    The 39th Japan Symposium on Commutative Algebra (Kyoto, Japan), 13-17 November
  55. Ulrich ideals and GGL rings in dimension one
    International Conference on Commutative Algebra and its Interaction to Combinatorics, Discrete Geometry and Singularity Theory (Hanoi and Ha Long, Vietnam), 11-15 September
  56. Ulrich ideals and GGL rings in dimension one
    International School and workshop on commutative algebra (Ho Chi Minh, Vietnam), 5-8 September
  57. Sally modules of rank one
    第14回可換環論サマースクール (Kanagawa, Japan), 21-24 August
  58. Gorenstein property of Rees algebras
    第14回可換環論サマースクール (Kanagawa, Japan), 21-24 August
  59. On generalized Gorenstein local rings
    明治大学可換環論セミナー (Kanagawa, Japan), 8 April
  60. First Hilbert coefficients
    International workshop on commutative algebra (Thai Nguyen, Vietnam), 4-7 January

    2016

  61. A minimal free resolution and type
    The 2nd International School on Commutative Algebra at Thai Nguyen University (Thai Nguyen, Vietnam), 5-11 June
  62. Numerical semigroup rings
    The 2nd International School on Commutative Algebra at Thai Nguyen University (Thai Nguyen, Vietnam), 5-11 June

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