研究者詳細

顔写真

タダ シユンスケ
多田 駿介
Shunsuke Tada
所属
数理科学共創社会センター 国際頭脳循環部門
職名
特任研究員
学位
  • 博士(人間環境学)(神戸大学)

  • 修士(理学)(東京工業大学)

学歴 3

  • 神戸大学 大学院人間発達環境学研究科 人間環境学専攻 博士課程

    2022年4月 ~ 2025年3月

  • 東京工業大学大学院 理学院 数学系 数学コース 修士課程

    2020年4月 ~ 2022年3月

  • 東京工業大学 理学院 数学系

    2016年4月 ~ 2020年3月

所属学協会 1

  • 日本数学会

    2023年10月 ~ 継続中

研究キーワード 3

  • 位相的データ解析

  • 表現論

  • パーシステントホモロジー

論文 3

  1. Summand-injectivity of interval covers and monotonicity of interval resolution global dimensions 査読有り

    Toshitaka Aoki, Emerson G. Escolar, Shunsuke Tada

    Journal of Applied and Computational Topology 9 (2) 2025年5月21日

    出版者・発行元: Springer Science and Business Media LLC

    DOI: 10.1007/s41468-025-00210-2  

    ISSN:2367-1726

    eISSN:2367-1734

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    Abstract Recently, there is growing interest in the use of relative homological algebra to develop invariants using interval covers and interval resolutions (i.e., right minimal approximations and resolutions relative to interval-decomposable modules) for multi-parameter persistence modules. In this paper, the set of all interval modules over a given poset plays a central role. Firstly, we show that the restriction of interval covers of modules to each indecomposable direct summand is injective. This result suggests a way to simplify the computation of interval covers. Secondly, we show the monotonicity of the interval resolution global dimension, i.e., if Q is a full subposet of P, then the interval resolution global dimension of Q is not larger than that of P. Finally, we provide a complete classification of posets whose interval resolution global dimension is zero.

  2. Bipath persistence 査読有り

    Toshitaka Aoki, Emerson G. Escolar, Shunsuke Tada

    Japan Journal of Industrial and Applied Mathematics 42 (1) 453-486 2024年12月17日

    出版者・発行元: Springer Science and Business Media LLC

    DOI: 10.1007/s13160-024-00681-3  

    ISSN:0916-7005

    eISSN:1868-937X

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    Abstract In persistent homology analysis, interval modules play a central role in describing the birth and death of topological features across a filtration. In this work, we extend this setting, and propose the use of bipath persistent homology, which can be used to study the persistence of topological features across a pair of filtrations connected at their ends, to compare the two filtrations. In this setting, interval-decomposability is guaranteed, and we provide an algorithm for computing persistence diagrams for bipath persistent homology and discuss the interpretation of bipath persistence diagrams.

  3. PRIME TENSOR IDEALS IN ABELIAN CATEGORIES OF REPRESENTATIONS OF QUIVERS OF TYPE A 査読有り

    Shunsuke TADA

    Kyushu Journal of Mathematics 77 (1) 159-177 2023年

    出版者・発行元: Faculty of Mathematics, Kyushu University

    DOI: 10.2206/kyushujm.77.159  

    ISSN:1340-6116

    eISSN:1883-2032

MISC 2

  1. On preservation of relative resolutions for poset representations

    Toshitaka Aoki, Shunsuke Tada

    2025年6月26日

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    The concept of Galois connections (i.e., adjoint pairs between posets) is ubiquitous in mathematics. In representation theory, it is interesting because it naturally induces the adjoint quadruple between the categories of persistence modules (representations) of the posets via Kan extensions. One of central subjects in multiparameter persistent homology analysis is to understand structures of persistence modules. In this paper, we mainly study a class of Galois connections whose left adjoint is the canonical inclusion of a full subposet. We refer to such a subposet as an interior system, with its corresponding right adjoint given by the floor function. In the induced adjoint quadruple, we call the left Kan extension along its floor function the contraction functor. From its construction, it is left adjoint to the induction functor. Under this setting, we firstly prove that this adjoint pair gives an adjoint pair between finitely presentable persistence modules. Moreover, we introduce a special class of interior systems called aligned interior systems, and prove that both induction and contraction functors over them preserve interval-decomposability of modules. Then, we use them to analyze interval covers and resolutions. We also compute interval resolution global dimensions for certain classes of finite posets.

  2. Stability of Bipath Persistence Diagrams

    Shunsuke Tada

    2025年3月3日

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    Recently, bipath persistent homology has been proposed as an extension of standard persistent homology, along with its visualization (bipath persistence diagram) and computational methods. In the setting of standard persistent homology, the stability theorem with respect to real-valued functions on a topological space is one of the fundamental results, which gives a mathematical justification for using persistent homology to noisy data. In proving the stability theorem, the algebraic stability theorem/the isometry theorem for persistence modules plays a central role. In this point of view, the stability property for bipath persistent homology is desired for analyzing data. In this paper, we prove the stability theorem of bipath persistent homology with respect to bipath functions on a topological space. This theorem suggests a stability of bipath persistence diagrams: small changes in a bipath function (except at their ends) result in only small changes in the bipath persistence diagram. Similar to the stability theorem of standard persistent homology, we deduce the stability theorem of bipath persistent homology by using the algebraic stability theorem/the isometry theorem of bipath persistence modules.

講演・口頭発表等 13

  1. Proposal of Bipath Persistent Homology: Visualization, Algorithm, and Stability

    多田駿介

    MathCCSセミナー 2025年10月25日

  2. バイパス・パーシステンス図の安定性

    多田駿介

    日本応用数理学会2025年度年会 2025年9月4日

  3. Bipath Persistent homology and its stability

    Shunsuke Tada

    TSVP Symposium: Representation Theory and Topological Data Analysis 2025年7月22日

  4. A Computation of Bipath Persistent Homology and Bipath Persistence Diagrams 招待有り

    Shunsuke Tada

    Asia Pacific Seminar on Applied Topology and Geometry 2024年9月20日

  5. Bipath persistence and interval approximation for persistence modules over finite posets 招待有り

    Shunsuke Tada

    Seminar, Applied CAT 2024年4月16日

  6. パーシステントホモロジーにおける区間表現のホモロジー代数的性質 招待有り

    多田駿介

    パーシステントホモロジーと表現論2024 2024年2月2日

  7. Posets whose persistence modules are always interval decomposable and homological invariants 招待有り

    Toshitaka Aoki, Emerson G. Escolar, Shunsuke Tada

    2024 Joint Mathematics Meetings (JMM 2024), AIM-AMS Special Session on Applied Topology Beyond Persistence Diagrams 2024年1月5日

  8. パーシステントホモロジー解析における 区間表現のホモロジー代数的性質

    青木 利隆, ESCOLAR, Emerson Gaw, 多田 駿介

    2023年度応用数学合同研究集会 2023年12月16日

  9. On interval global dimension of posets: a characterization of case 0

    Toshitaka Aoki, Emerson G. Escolar, Shunsuke Tada

    日本数学会 2023年度秋季総合分科会 2023年9月22日

  10. On interval global dimension of posets: a characterization of case 0

    Toshitaka Aoki, Emerson Gaw Escolar, Shunsuke Tada

    第55回環論および表現論シンポジウム(2023年) 2023年9月5日

  11. Interval resolution global dimension and interval cover

    Toshitaka Aoki, Emerson G. Escolar, Shunsuke Tada

    TDA week 2023 2023年7月31日

  12. パーシステント加群と区間表現

    多田駿介

    第6回数理新人セミナー 2023年2月21日

  13. Prime ideals in categories of representations of quivers of type A

    Shunsuke Tada

    AATRN virtual poster session 2022年9月20日

︎全件表示 ︎最初の5件までを表示

共同研究・競争的資金等の研究課題 1

  1. バイパス・パーシステントホモロジー理論の応用への展開 ー逆解析手法の構築と実装ー

    多田 駿介

    2025年7月31日 ~ 2027年3月31日