Keio University · Faculty of Science and Engineering / Graduate School of Science and Engineering · 教授

Research keywordsCAT(0) spaces・geometric group theory・amenable groups・fixed point properties・Poisson boundary rigidity・random groups

Research fieldsGeometry・Mathematics・代数学・幾何学・Mathematics and Physics・Science・Science and Engineering・解析学

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• A CAT(0) alternative for amenable groups and a Kazhdan-type rigidity principle2026 · 2026年03月
• Torsion groups of subexponential growth cannot act on finite-dimensional CAT(0)-spaces without a fixed point2026 · Commentarii Mathematici Helvetici
• Isometric group actions with vanishing rate of escape on CAT(0) spaces2023 · Geom. Funct. Anal. 33
• ランダム群の固定点性質2018 · 京都大学数理解析研究所講究録 2018年04月

• 同変境界写像を基盤とする幾何学的剛性理論の構築2025 · -
• ラプラシアン固有値最大化と極小曲面2022 · -
• 幾何学的剛性理論の深化2020 · -
• 離散群の非等長的作用の剛性と非線形スペクトルギャップ2017 · -

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