Talks

2024

Floer-type bipersistence modules and rectangle barcodes

Workshop on geometry of foliations and its applications
Dec 20, 2024 12:00 — Dec 22, 2024 12:00 Kyoto University of Education, Japan

Morse bipersistence modules and rectangle barcodes

Singularity Theory and its related fields
Jun 20, 2024 16:00 — 16:45 Chitose Arcadia Plaza, Japan

2-parameter persistence modules and rectangle barcodes

Topology Seminar
Jun 5, 2024 17:00 — 18:30 Osaka University, Japan

Topological complexity of monotone symplectic manifolds

AATRN Topological Complexity Seminar
Feb 23, 2024 00:30 — 01:30 Zoom
YouTube

2023

Topological complexity of monotone symplectic manifolds

The 7th Workshop on Geometric Group Theory
Nov 27, 2023 17:00 — 18:00 Niigata Unison Plaza, Japan

2022

A hierarchy of rigid subsets of symplectic manifolds

Seminar
Feb 4, 2022 15:00 — 16:10 KIAS (Zoom)

2021

A hierarchy of rigid subsets of symplectic manifolds

AS-NCTS Seminar on Geometry
Dec 24, 2021 16:00 — 17:10 Academia Sinica & NCTS, National Taiwan University (Webex)

Rigid fibers of integrable systems on cotangent bundles

The 3rd Japan-Taiwan Joint Conference on Differential Geometry
Nov 2, 2021 11:30 — 12:10 OCAMI, Osaka City University & NCTS, National Taiwan University (Webex)

2020

Pseudoheavy subsets in symplectic manifolds

12th International Symposium on Natural Sciences
Oct 7, 2020 15:30 — 16:10 Incheon National University, South Korea (Zoom)

Rigid fibers of spinning tops

MSJ Spring Meeting 2020
Mar 16, 2020 14:35 — 14:50 Nihon University, Japan

Rigid fibers of spinning tops

Contact Structures, Singular Points, and Related Topics
Jan 23, 2020 16:20 — 17:10 Shizuoka, Japan

2019

Rigid fibers of spinning tops

International workshop on Geometry of Foliated Spaces
Nov 30, 2019 09:00 — 09:50 Ritsumeikan University, Japan

Existence of pseudo-heavy fibers of moment maps

Geometry Seminar
Jun 25, 2019 15:00 — 16:30 Tohoku University, Japan

Existence of pseudo-heavy fibers of moment maps

Differential Topology Seminar
Apr 23, 2019 15:00 — 16:30 Kyoto University, Japan

The number of fixed points of Hamiltonian diffeomorphisms

Seminar
Jan 25, 2019 11:00 — 12:00 Seoul National University, South Korea

From Morse homology to Floer homology II

Seminar
Jan 22, 2019 14:00 — 17:00 Korea Institute for Advanced Study (KIAS), South Korea

From Morse homology to Floer homology I

Seminar
Jan 21, 2019 14:00 — 17:00 Korea Institute for Advanced Study (KIAS), South Korea

2018

Periodic orbits of Hamiltonian systems and Floer theory II

Topics on Lagrangian submanifolds and Hamiltonian dynamics
Jul 13, 2018 13:00 — 14:30 Chiba University, Japan

Periodic orbits of Hamiltonian systems and Floer theory I

Topics on Lagrangian submanifolds and Hamiltonian dynamics
Jul 12, 2018 13:00 — 14:30 Chiba University, Japan

Disjoint superheavy subsets and fragmentation norms

Geometry Seminar
Apr 13, 2018 16:30 — 18:00 Tokyo Metropolitan University, Japan

2017

The number of fixed points of Hamiltonian diffeomorphisms

15th Taiwan Geometry Symposium
Nov 18, 2017 15:30 — 16:30 National Tsing Hua University, Taiwan

Asphericity, Eilenberg–MacLane spaces and periodic orbits in Hamiltonian dynamics

Seminar
Nov 8, 2017 16:00 — 18:00 IBS Center for Geometry and Physics, South Korea

Asphericity and non-contractible periodic orbits in Hamiltonian dynamics

East Asian Symplectic Conference 2017
Oct 31, 2017 16:00 — 17:00 Sichuan University, China

Floer theory and non-contractible periodic orbits

NCTS Differential Geometry Seminar
Sep 21, 2017 14:00 — 16:00 National Taiwan University, Taiwan

Floer–Novikov theory and non-contractible periodic orbits

64th Geometry Symposium
Aug 30, 2017 13:30 — 14:10 Kanazawa University, Japan

On the existence of infinitely many non-contractible periodic orbits in Hamiltonian dynamics on closed symplectic manifolds

Hamiltonian and Reeb Dynamics, New Methods and Applications
Jul 21, 2017 10:15 — 11:00 Lorentz Center, The Netherlands

Floer–Novikov theory and non-contractible periodic trajectories

Topology Seminar
Jul 14, 2017 13:30 — 15:30 Gakushuin University, Japan

Floer–Novikov theory and non-contractible periodic trajectories

Topology Seminar
May 19, 2017 16:00 — 17:00 Kyushu University, Japan

On the existence of infinitely many non-contractible periodic trajectories in Hamiltonian dynamics on closed symplectic manifolds

Tuesday Seminar on Topology
Jan 24, 2017 17:00 — 18:00 The University of Tokyo, Japan

On the existence of infinitely many non-contractible periodic trajectories in Hamiltonian dynamics on closed symplectic manifolds

Contact Structures, Singular Points, and Related Topics
Jan 18, 2017 14:00 — 14:50 Kanazawa University, Japan

2016

Non-contractible periodic orbits in Hamiltonian dynamics on tori

Geometry Seminar
Jun 24, 2016 16:30 — 18:00 Tokyo Metropolitan University, Japan

Non-contractible periodic orbits in Hamiltonian dynamics on tori

Workshop on Symplectic Geometry and Physics
May 25, 2016 16:45 — 17:45 Tohoku University, Japan
YouTube

2014

Morse theory for manifolds with boundary

51st Topology Freshers’ Seminar
Jul 23, 2014 15:40 — 15:55 Zaō, Miyagi, Japan

Morse–Bott inequalities for manifolds with boundary

11th Kanto Young Geometers’ Seminar
May 31, 2014 13:00 — 14:00 Waseda University, Japan

Morse–Bott inequalities for manifolds with boundary

Morse Theory and Related Topics
Jan 12, 2014 14:30 — 16:30 Kyoto University, Japan

2012

Applications of Morse Theory

49th Topology Freshers’ Seminar
Aug 15, 2012 14:15 — 14:30 Karatsu, Saga, Japan

Morse homology of Grassmann manifolds

Geometry and Transformation Groups 2012
Jul 27, 2012 00:00 Tambara Institute of Mathematical Sciences, The University of Tokyo, Japan