論文等
2026
Relative simplicity of the universal coverings of transformation groups and Tsuboi's metric
Morimichi Kawasaki, Mitsuaki Kimura, Hiroki Kodama, Yoshifumi Matsuda, Takahiro Matsushita, Ryuma Orita — Journal of Topology and Analysis, Online Ready
2025
Topological complexity of monotone symplectic manifolds
Ryuma Orita — Tokyo Journal of Mathematics, vol. 48 (2025), no. 1, pp. 217-230
2023
Floer-type bipersistence modules and rectangle barcodes
Kanta Koeda, Ryuma Orita, Kanon Yashiro — arXiv:2312.07847
2022
Rigid fibers of integrable systems on cotangent bundles
Morimichi Kawasaki, Ryuma Orita — Journal of the Mathematical Society of Japan, vol. 74 (2022), no. 3, pp. 829–847
2020
Existence of pseudoheavy fibers of moment maps
Morimichi Kawasaki, Ryuma Orita — Communications in Contemporary Mathematics, vol. 23 (2021), no. 5, 2050047
On the existence of infinitely many non-contractible periodic orbits of Hamiltonian diffeomorphisms of closed symplectic manifolds
Ryuma Orita — Journal of Symplectic Geometry, vol. 17 (2019), no. 6, pp. 1893–1927
2019
Disjoint superheavy subsets and fragmentation norms
Morimichi Kawasaki, Ryuma Orita — Journal of Topology and Analysis, vol. 13 (2021), no. 2, pp. 443–468
2018
Application of fragmentation norms to transported points by Hamiltonian isotopies
Morimichi Kawasaki, Ryuma Orita — RIMS Kôkyûroku, vol. 2098 (2018), pp. 57–59
2017
Morse-Bott inequalities for manifolds with boundary
Ryuma Orita — Tokyo Journal of Mathematics, vol. 41 (2018), no. 1, pp. 113–130
Non-contractible periodic orbits in Hamiltonian dynamics on tori
Ryuma Orita — Bulletin of the London Mathematical Society, vol. 49 (2017), no. 4, pp. 571–580
Computation of annular capacity by Hamiltonian Floer theory of non-contractible periodic trajectories
Morimichi Kawasaki, Ryuma Orita — Journal of Modern Dynamics, vol. 11 (2017), pp. 313–339