Sasaki Atsumu

ササキアツム | Sasaki Atsumu

Affiliation and department：
Job title： Professor
Homepage URL (1)： https://sites.google.com/site/atsumusasaki/home

Research field (3)： Mathematical analysis , Geometry , Algebra

Research keywords (10)： reductive real spherical homogeneous space , 対称空間 , 複素多様体 , 無重複表現 , リー群の表現論 , Homogeneous space , Symmetric space , Complex manifold , Multiplicity-free representation , Representation theory of Lie group

Research theme for competitive and other funds (6)：

2023 - 2027 簡約型実球等質空間に対するカルタン分解に付随するワイル群とワイルの部屋の研究
2019 - 2023 A Cartan decomposition, restricted roots and invariant measure of real spherical homogeneous spaces of reductive type
2015 - 2019 A study of Cartan decompositions and invariant measures for spherical homogeneous spaces of reductive type
2012 - 2015 Classification theory of visible actions on complex homogeneous spaces
2010 - 2011 Geometric structures of non-symmetric spherical manifolds by strongly visible actions

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Papers (17)：

Atsumu Sasaki. Invariant measures on non-symmetric reductive real spherical homogeneous spaces of rank-one type. accepted for publication. 2024
Atsumu Sasaki. Multiplicity-free representations and visible actions. accepted for publication in Sugaku Expositions. 2023
笹木集夢. 無重複表現と可視的作用. 日本数学会「数学」. 2022. 74. 3
Ali Baklouti, Atsumu Sasaki. Visible actions and geometric criteria for multiplicity-freeness of representations of Heisenberg groups. Journal of Lie Theory. 2021. 31. 3. 719-750
Baba Kurando, Osamu Ikawa, Atsumu Sasaki. A duality between non-compact semisimple symmetric pairs and commutative compact semisimple symmetric triads and its general theory. Differential Geometry and its Applications. 2021. 76. 101751

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MISC (26)：

Visible actions and criteria for multiplicity-freeness of restrictions of quasi-regular representations of Heisenberg groups. 2022. 2234. 65-75
Geometric criteria for multiplicity-freeness of representations of Heisenberg groups. 2021. 105-113
笹木集夢. Visible actions on Heisenberg homogeneous spaces and application to representation theory. 2019名城幾何学研究集会「多様体上の種々の幾何構造の融合」講演アブストラクト. 2019. 38-40
笹木集夢. ケーリー型球等質空間に対する群作用と軌道分解. 名城大学幾何学研究集会「多様体上の計量と幾何構造」講演アブストラクト. 2017. 30-34
SASAKI Atsumu. Visible actions on spherical nilpotent orbits (Development of group actions and submanifold theory). RIMS Kokyuroku. 2014. 1929. 112-123

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Lectures and oral presentations (112)：

Weyl group of pseudo-Riemannian semisimple symmetric spaces
(東京理科大学創域理工学部数理科学科談話会/東京理科大学幾何学セミナーとの合同開催 2024)
Weyl group of pseudo-Riemannian symmetric space
(2024)
Weyl group of pseudo-Riemannian symmetric space
(2024)
Invariant measures on reductive real spherical homogeneous spaces
(7th Tunisian-Japanese Conference "Geometric and Harmonic Analysis on Homogeneous Spaces and Applications" in Honor of Professor Toshiyuki Kobayashi 2023)
A classification theory of visible actions on complex manifolds and multiplicity-free representations
(2023)

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Education (3)：

2004 - 2008 Waseda University Graduate School of Science and Engineering
2002 - 2004 Waseda University Graduate School of Science and Engineering
1998 - 2002 Waseda University School of Science and Engineering

Professional career (1)：

Doctor of Science (Waseda University)

Work history (8)：

2023/04 - 現在東海大学大学院理学研究科数理科学専攻専攻長(兼務)
2023/04 - 現在東海大学理学部数学科学科長
2023/04 - 現在東海大学理学部数学科/大学院理学研究科数理科学専攻/総合理工学研究科総合理工学専攻物理・数理科学コース教授
2015/04 - 2023/03 Tokai University Associate Professor
2019/10 - 2020/03 Friedrich-Alexander Universität, Erlangen-Nürnberg Department of Mathematics Guest Researcher (6 months)

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Committee career (9)：

2023/07 - 現在日本数学会広報委員会委員
2023/03 - 2024/02 2023年度実函数論・函数解析学合同シンポジウム委員
2023/03 - 2024/02 The Mathematical Society of Japan Member of subcomittee of functional analysis
2022/03 - 2023/02 2022年度実函数論・函数解析学合同シンポジウム委員
2022/03 - 2023/02 表現論シンポジウム講演集刊行会事務連絡担当者・編集作業担当者

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Association Membership(s) (2)：

日本数学会 , The Mathematical Society of Japan

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