Specialities

Geometry

Speciality Keywords

geometric topology, foliation

Research Themes

Books

Papers

• 　The flux homomorphism and central extensions of diffeomorphism groups　Shuhei Maruyama　Osaka Journal of Mathematics　58　2　319　2021/04
• 　Extensions of quasi-morphisms to the symplectomorphism group of the disk　Shuhei Maruyama　Topology and its Applications　305　107880　2022/01
• 　The Dixmier-Douady classes and abelian extensions of groups of homeomorphisms　Shuhei Maruyama　Topology and its Applications　336　108600　2023/08
• 　The Flux Homomorphism on a Surface with Boundary and Central Extensions of Diffeomorphism Groups　Shuhei MARUYAMA　Tokyo Journal of Mathematics　45　2　2022/12/01
• 　Mixed commutator lengths, wreath products and general ranks　Morimichi Kawasaki,Mitsuaki Kimura,Shuhei Maruyama,Takahiro Matsushita,Masato Mimura　Kodai Mathematical Journal　46　2　2023/06/30

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Conference Presentations

• On the boundedness of characteristic classes for foliated symplectic and contact fibrations(2023/09/05)
• Non-extendable invariant quasimorphisms for groups acting on the circle(conference：Workshop on Orderings and Groups)(2023/06/13)
• A characteristic class of Hamiltonian fibrations and a group cocycle(conference：Stanford Symplectic Geometry Seminar)(2020/11/16)

Others

Arts and Fieldwork

Patent

Theme to the desired joint research

○topology

Grant-in-Aid for Scientific Research

Competitive research funding,Contribution

Collaborative research,Consignment study

Classes (Bachelors)

Classes (Graduate Schools)