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J-GLOBAL ID：200901074634811097   Update date: Apr. 04, 2025

Hirai Hiroshi

ヒライ ヒロシ | Hirai Hiroshi
Affiliation and department：
Nagoya University Graduate School of Mathematics

About Nagoya University Graduate School of Mathematics


Job title： Professor
Homepage URL  (1)： https://www.math.nagoya-u.ac.jp/~hirai.hiroshi/index.html
Research field  (3)： Mathematical informatics ,  Applied mathematics and statistics ,  Basic mathematics
Research keywords  (3)： optimization ,  algorithm ,  離散数学
Research theme for competitive and other funds  (12)：
  • 2024 - 2030 非正曲率空間上の次世代凸最適化
  • 2021 - 2024 Auction design for two-sided markets: an approach from discrete optimization
  • 2019 - 2023 新しい凸性に基づくアルゴリズムと最適化理論
  • 2017 - 2021 Exploring novel discrete convexity in discrete optimization and designing high performance algorithms based on it
  • 2013 - 2019 Developments of discrete optimization theory and efficient algorithms based on submodular structures
Show all
Papers (64)：
  • Hiroshi Hirai, Ryosuke Sato. Polyhedral Clinching Auctions for Indivisible Goods. ACM Transactions on Economics and Computation. 2025. 13. 1. 1-30
  • Jérémie Chalopin, Victor Chepoi, Anthony Genevois, Hiroshi Hirai, Damian Osajda. Helly groups. Geometry and Topology. 2025. 29. 1. 1-70
  • Hiroshi Hirai, Yuni Iwamasa, Taihei Oki, Tasuku Soma. Algebraic combinatorial optimization on the degree of determinants of noncommutative symbolic matrices. Mathematical Programming. 2024
  • Koyo Hayashi, Hiroshi Hirai, Keiya Sakabe. Finding Hall Blockers by Matrix Scaling. Mathematics of Operations Research. 2024. 49. 4. 2166-2179
  • Hiroshi Hirai, Keiya Sakabe. Gradient descent for unbounded convex functions on Hadamard manifolds and its applications to scaling problems. FOCS. 2024. 2387-2402
ｍore...
MISC (4)：
  • 平井広志. CAT(0)空間上のアルゴリズムと最適化について. 電子情報通信学会誌. 2018. 101. 3
  • Hiroshi Hirai. Discrete convex functions on graphs and their algorithmic applications. Combinatorial Optimization and Graph Algorithms: Communications of NII Shonan Meetings. 2017. 67-100
  • Discrete convex function on graph structure and its application. 2014. 92. 59-64
  • 平井 広志. T_X-approaches to multiflows and metrics. RIMS Kokyrurok Bessatsu. 2010. B23. 107-130
Lectures and oral presentations  (23)：
  • A scaling characterization of nc-rank via unbounded gradient flow
    (OT勉強会1 2025)
  • 距離空間の tight span について
    (Magnitude 2024 2025)
  • 行列スケーリングから非正曲率空間上の測地凸最適化へ
    (最適化・計算機科学・代数幾何 2024)
  • 非正曲率空間のアルゴリズムと最適化について
    (名古屋大学多元数理科学研究科 大談話会 2023)
  • 行列スケーリングから非正曲率空間上の測地的凸最適化へ
    (第35回 RAMP 数理最適化シンポジウム (RAMP 2023) 2023)
ｍore...
Education (2)：
  • 2002 - 2004 The University of Tokyo
  • 2000 - 2002 The University of Tokyo The Faculty of Engineering Department of Mathematical Engineering and Information Physics
Professional career (1)：
  • Doctor of Science (Kyoto University)
Work history (4)：
  • 2023/05 - 現在 Nagoya University Graduate School of Mathematics Professor
  • 2014/04 - 2023/05 The University of Tokyo The Graduate School of Information Science and Technology, Department of Mathematical Informatics
  • 2010/11 - 2014/03 The University of Tokyo The Graduate School of Information Science and Technology, Department of Mathematical Informatics
  • 2004/04 - 2010/10 Kyoto University Research Institute for Mathematical Sciences
Committee career (2)：
  • 2021/01 - 現在 SIAM Journal on Applied Algebra and Geometry (SIAGA) Associate Editor
  • 2019/04 - 現在 日本応用数理学会 離散システム研究部会 主査
Awards (7)：
  • 2019/03 - 日本オペレーションズ・リサーチ学会フェロー
  • 2018/09 - 日本オペレーションズ・リサーチ学会60周年記念論文賞
  • 2018/04 - 文部科学大臣表彰 若手科学者賞
  • 2015/06 - 人工知能学会研究会優秀賞
  • 2014/08 - 日本オペレーションズ・リサーチ学会研究賞
Show all
Association Membership(s) (2)：
日本オペレーションズリサーチ学会 ,  THE JAPAN SOCIETY FOR INDUSTRIAL AND APPLIED MATHEMATICS
※ Researcher’s information displayed in J-GLOBAL is based on the information registered in researchmap. For details, see here.

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