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Last Updated :2025/04/30

So Yamagata

Faculty of Science
Assistant Lecturer/Assistant professor

Researcher information

■ Degree
  • The degree of Doctor of Philosophyin the field of Mathematics at the Graduate School of Science,, Hokkaido University, Mar. 2021
■ Research Keyword
  • (pure) braid group
  • intersection lattice
  • discriminantal arrangement
  • hyperplane arrangement
■ Field Of Study
  • Natural sciences, Geometry
  • Natural sciences, Algebra

Career

■ Career
  • Sep. 2022 - Present
    Fukuoka University, Faculty of Science Department of Applied Mathematics, Assistant professor
  • Apr. 2022 - Sep. 2022
    Rakuno Gakuen University, College of Agriculture, Food and Environment Sciences Department of Environmental and Symbiotic Science, Part-time lecturer
  • Apr. 2022 - Sep. 2022
    Hokkaido University of Education, Part-time lecturer
  • Apr. 2022 - Sep. 2022
    Hokkaido University, Center for teaching and learning, Researcher
  • Sep. 2021 - Apr. 2022
    Muroran Institute of Technology, 創造工学科, Part-time lecturer
  • Sep. 2021 - Sep. 2022
    Hokkaido University, General Education Fundamental Courses, Part-time lecturer
  • Apr. 2021 - Mar. 2022
    JSPS Research Fellow (changed to PD)
  • Apr. 2021 - Sep. 2021
    Rakuno Gakuen University, Part-time teacher
  • Apr. 2020 - Mar. 2021
    JSPS Research Fellow (DC2)
  • Oct. 2016 - Mar. 2021
    Ambitious Leader's Program
■ Educational Background
  • Apr. 2018 - Mar. 2021
    Hokkaido University, Department of Mathematics, Grasuate School of Science, Doctor Course
  • Apr. 2016 - Mar. 2018
    Hokkaido University, Department of Mathematics, Graduate School of Science, Master Course
  • Apr. 2012 - Mar. 2016
    Hokkaido University, School of Science, Department of Mathematics
■ Member History
  • Apr. 2019 - Mar. 2020
    Organizer, The 16th Mathematics Conference for Young Researchers
  • Apr. 2018 - Mar. 2019
    Organizer, The 15th Mathematics Conference for Young Researchers
  • Dec. 2017 - May 2018
    Representative, The 4th ALP-MD symposium

Research activity information

■ Award
  • Apr. 2019
    Graduate School of Science, Hokkaido University, Graduate School of Science, Excellent Research Encouragement Award
    Yamagata So
  • May 2017
    The 3rd MD(Tohoku University)×ALP(Hokkaido University) Symposium Poster Award
    COUNTING CHAMBERS IN A FLAT
    Yamagata So
■ Paper
  • A classification of combinatorial types of discriminantal arrangements
    So Yamagata
    Journal of Algebraic Combinatorics, 18 Jan. 2023, 57(4):1007 - 1032, Refereed
  • On the non-very generic intersections in discriminantal arrangements
    Simona Settepanella; So Yamagata
    Comptes Rendus. Mathématique, 29 Sep. 2022, 360(G9):1027 - 1038, Refereed
  • Pappus's Theorem in Grassmannian Gr(3, ℂ^n)
    Simona Settepanella; Sumire Sawada; So Yamagata
    Ars Mathematica Contemporanea, 06 Jan. 2019, 16(1):257 - 276, Refereed
  • Discriminantal arrangement, 3 × 3 minors of Plücker matrix and hypersurfaces in Grassmannian Gr(3, n)
    Sumire Sawada; Simona Settepanella; So Yamagata
    COMPTES RENDUS MATHEMATIQUE, Nov. 2017, 355(11):1111 - 1120, Refereed
■ MISC
  • Mapping fiber, loop and suspension graphs in naive discrete homotopy theory
    So yamagata
    arXiv: 2402.15714., Feb. 2024
  • A categorification for the characteristic polynomial of matroids
    Takuya Saito; So Yamagata
    arXiv:2402.09851, Feb. 2024
  • A braid monodromy presentation for the pure braid group
    So Yamagata
    arXiv:2305.18697, May 2023
  • A splitting property of the chromatic homology
    So Yamagata
    arXiv:2301.01972, Jan. 2023
  • A linear condition for non-very generic discriminantal arrangements
    Simona Setetpanella; So Yamagata
    arXiv:2205.04664, May 2022
  • 第16回数学総合若手研究集会 : 数学の交叉点
    豊川 永喜; 乙戸 勇大; 佐藤 直飛; 松坂 公暉; 山形 颯; 吉田 啓佑; 足利 涼介; 沖田 誠悟; 小山 元希; 桑田 健; 三栖 邦康; 石井 宙志; 祐川 翼
    Hokkaido University technical report series in Mathematics, 23 Mar. 2020, 178:1 - 682
  • 第15回数学総合若手研究集会 : 数学の交叉点
    福田 一貴; 青木 雅允; 植田 優基; 上島 芳倫; 矢不 俊文; 新村 貴之; 佐藤 直飛; 豊川 永喜; 松坂 公暉; 山形 颯; 吉田 啓佑
    Hokkaido University technical report series in Mathematics, 12 Mar. 2019, 176:1 - 646
  • Braid配置の一般化とその組合せ論的構造について
    Yamagata So
    Proceedings of the 24th Algebra Symposium for Young Researchers, 2019, :38 - 46
  • Discriminantal arrangementとプリュッカー行列、グラスマン多様体の超曲面
    Yamagata So
    Hokkaido University Elaboration book, 2018, 173:497 - 506
■ Lectures, oral presentations, etc.
  • 離散ホモトピー論におけるマッピングファイバーグラフについて
    So Yamagata
    MSJ Spring Meeting 2025, 20 Mar. 2025
  • Categorification of polynomial invariants of matroids
    So Yamagata
    Geometry and Analysis, 16 Feb. 2025
  • Categorification of polynomial invariants of matroids
    So Yamagata
    Fukuoka Homotopy Theory Seminar 2025, 11 Jan. 2025
  • Mapping fiber graphs in naive discrete homotopy theory
    So Yamagata
    Combinatorial Algebraic Topology, and Applications II, 02 Oct. 2024
  • Mapping fiber graphs in naive discrete homotopy theory
    So Yamagata
    Topology, Algebra and Dynamical Systems seminar, 24 Sep. 2024
  • Mapping fiber graphs in discrete homotopy theory,
    So Yamagata
    Homotopy theory symposium, 29 Jun. 2024
  • 純組紐群の表示と組紐配置の切断について
    So Yamagata
    MSJ Spring Meeting 2024, 17 Mar. 2024
  • On discrete relative homotopy groups
    So Yamagata
    9th Mexican Workshop on Applied Geometry and Topology, 10 Nov. 2023
  • A braid monodromy presentation for the pure braid group
    So Yamagata
    Polynomial Mathematics Seminar, 02 Nov. 2023
  • A splitting property of the chromatic homology
    So Yamagata
    Homotopy Okinawa 2023, 01 Jul. 2023
  • r-setの分類と超平面配置がnon-very genericとなるための十分条件について
    So Yamagata
    MSJ Spring Meeting 2023, 15 Mar. 2023
  • A characteristic homology for graphic arrangements
    So Yamagata
    Characteristic Polynomials of Hyperplane Arrangements and Ehrhart Polynomials of Convex Polytopes, 14 Feb. 2023
  • A classificaion of combinatorial types of discriminantal arrangements
    So Yamagata
    Combinatorics, geometry and commutative algebra of hyperplane arrangements, 16 Jan. 2023
  • 超平面配置の non very genericy について
    山形颯
    日本数学会2022年度年会, 29 Mar. 2022
  • Combinatorics of discriminantal arrangement
    So YAMAGATA
    Conference on Combinatorics and its Applications 2021, 19 Aug. 2021
  • Combinatorics of discriminantal arrangement
    So Yamagata
    Recent developments in Arrangements, 16 Feb. 2021
  • Combinatorics of the discriminantal arrangement
    Yamagata So
    Hyperplane arrangements and Japanese Australian workshop on Real and Complex Singularities, 05 Dec. 2019
  • Combinatorics of the Discriminantal arrangement
    Yamagata So
    Homotopy Theory Symposium, 29 Oct. 2019
  • 彩色多項式の圏化
    Yamagata So
    COmbinatorics Summer school 2019 (COS 2019), 05 Sep. 2019
  • Combinatorics of Discriminantal Arrangement
    Yamagata So
    Japanese Conference on Combinatorics and its Applications (JCCA-2019), 29 Aug. 2019
  • Combinatorics of the Discriminantal arrangement and Pappus' theorem
    Yamagata So
    Discrete Geometric Structure Seminar, 26 Apr. 2019
  • Pappus’ theorem in Grassmannian
    Yamagata So
    On hyperplane arrangements, configuration spaces and related topics, 22 Feb. 2019
  • Braid配置の一般化とその組合せ論的構造について
    Yamagata So
    The 24th conference for young researcher of algebra, 18 Feb. 2019
  • Braid配置の一般化とその組合せ論的構造について
    Yamagata So
    MSJ (The Mathematical Society of Japan) Autumn meeting 2018, 28 Sep. 2018
  • Combinatorics of discriminantal arrangement and Pappus' theorem
    Yamagata So
    PISA-HOKKAIDO-ROMA2 Summer School on Mathematics and Its Applications, 30 Aug. 2018
  • Braid配置の一般化とその組合せ論的構造について
    Yamagata So
    COmbinatorics Summer school 2018, 09 Aug. 2018
  • Discriminantal arrangement and quadric in Grassmannian
    Yamagata So
    Hokkaido university day, 28 Mar. 2018
  • Discriminantal arrangement とプリュッカー行列、グラスマン多様体の超曲面
    The; th Mathematics Conference for Young Researchers
    The 14th Mathematics Conference for Young Researchers, 01 Mar. 2018
  • Discriminantal Arrangement, 3×3 Minors of Plücker Matrix and Hypersurfaces in Grassmannian Gr(3,n)
    Yamagata So
    Discrete Geometric Structure Seminar, 25 Jan. 2018
  • Lattice and 3×3 matrices of Plücker coordinate matrix,
    Yamagata So
    第3回MDプログラム×北海道大学ALP合同シンポジウム, 19 May 2017
  • Lattice and 3×3 matrices of Plücker coordinate matrix
    YAMAGATA So
    The 4th International Symposium on AMBITIOUS LEADER’S PROGRAM Fostering Future Leaders to Open New Frontiers in Materials Science, 08 Nov. 2016
  • Lattice of discriminantal arrangement and 3×3 matrices of Plücker coordinate matrix
    YAMAGATA So
    PISA-HOKKAIDO Summer School on Mathematics and Its Applications, 01 Sep. 2016
■ Courses
  • 数式処理実習
    99 Apr. 2024
    福岡大学
  • 数理モデルⅡ「社情ｺｰｽ」（微分方程式で探る数理モデル）
    20 Sep. 2023
    福岡大学
  • 情報数理
    20 Sep. 2023
    福岡大学
  • 数学IV
    20 Apr. 2023
    福岡大学
  • 数理モデルⅡ「社情ｺｰｽ」（微分方程式で探る数理モデル）
    20 Sep. 2022
    福岡大学
  • Introduction to Informatics I
    20 Apr. 2022
    Hokkaido University
  • Calculsu V
    20 Apr. 2022
    Hokkaido University of Education
  • 数学I R・W[1年]
    20 Apr. 2022
    酪農学園大学 環境共生学類
  • Calculus B
    20 Oct. 2021
    Muroran Institute of Technology
  • Calculus II
    20 Oct. 2021
    Hokkaido University
  • Mathematics IW[1st year]
    20 Apr. 2021
    Rakuno Gakuen University
  • TA: Interactive Group Study in Mathematics
    20 Oct. 2020
    Hokkaido University
  • TA: Interactive Group Study in Mathematics
    20 Oct. 2019
    Department of Mathematics, Faculty of Science, Hokkaido University
  • TA: Interactive Group Study in Mathematics
    20 Oct. 2018
    Department of Mathematics, Faculty of Science, Hokkaido University
■ Affiliated academic society
  • THE MATHEMATICAL SOCIETY OF JAPAN
■ Research Themes
  • 離散ホモトピー論の手法による超平面配置の位相幾何的研究
    日本学術振興会, 科学研究費助成事業, 若手研究
    福岡大学
    01 Apr. 2024 - 31 Mar. 2029
  • ブレイドモノドロミーの手法による超平面配置の位相幾何的研究
    Fukuoka University, Recommended Research Projects
    Fukuoka University
    Jul. 2023 - Mar. 2024
  • 判別的配置とその組合せ論
    Japan Society for the Promotion of Science, Grants-in-Aid for Scientific Research, Grant-in-Aid for JSPS Fellows
    Hokkaido University
    24 Apr. 2020 - 31 Mar. 2022
  • 判別的配置の高余次元の構造の解明，及びその応用
    Ambitious Leader's program, 海外共同研究経費
    Hokkaido University
    Feb. 2020 - Mar. 2021
  • 判別的配置とその組合せ論
    Ambitious Leader's program, 独創的な研究活動経費, 競争的資金
    Hokkaido University
    Jun. 2019 - Mar. 2020
  • On Generalized Pure Braid Groups
    Japan Society for the Promotion of Science, Grants-in-Aid for Scientific Research, Grant-in-Aid for Scientific Research (C)
    Hokkaido University
    01 Apr. 2016 - 31 Mar. 2019
  • 超平面配置の組合せ論とパップスの定理の一般化
    Ambitious Leader's program, 独創的な研究活動経費, 競争的資金
    Hokkaido University
    Jun. 2018 - Mar. 2019
  • 判別的配置における超平面，プリュッカー行列の3×3小行列式とグラスマン多様体Gr(3,n)
    Ambitious Leader's program, 独創的な研究活動経費, 競争的資金
    Hokkaido University
    Jun. 2017 - Mar. 2018