M. Mimura

activity

20092023

most citedFixed point properties and second bounded cohomology of universal lattices on Banach space

22 citations · 80 across the 24 of their papers we have counts for

collaborators

26 papers

math.GR2023

Coarse group theoretic study on stable mixed commutator length

Morimichi Kawasaki, Mitsuaki Kimura, Shuhei Maruyama +2

Let $G$ be a group and $N$ a normal subgroup of $G$ . We study the large scale behavior, not the exact values themselves, of the stable mixed commutator length $sc l_{G, N}$ on the mi…

math.GR2022

Survey on invariant quasimorphisms and stable mixed commutator length

Morimichi Kawasaki, Mitsuaki Kimura, Shuhei Maruyama +2

A homogeneous quasimorphism $ϕ$ on a normal subgroup $N$ of $G$ is said to be $G$ -invariant if $ϕ (g x g^{- 1}) = ϕ (x)$ for every $g \in G$ and for every $x \in N$ . Invariant quasimorp…

math.GT2022

Invariant quasimorphisms for groups acting on the circle and non-equivalence of SCL

Shuhei Maruyama, Takahiro Matsushita, Masato Mimura

We construct invariant quasimorphisms for groups acting on the circle. Furthermore, we provide a criterion for the non-extendablity of the resulting quasimorphisms and an explicit…

math.GR2022

Mixed commutator lengths, wreath products and general ranks

Morimichi Kawasaki, Mitsuaki Kimura, Shuhei Maruyama +2

In the present paper, for a pair $(G, N)$ of a group $G$ and its normal subgroup $N$ , we consider the mixed commutator length $cl_{G, N}$ on the mixed commutator subgroup $[…

math.GR2021

The space of non-extendable quasimorphisms

Morimichi Kawasaki, Mitsuaki Kimura, Shuhei Maruyama +2

For a pair $(G, N)$ of a group $G$ and its normal subgroup $N$ , we consider the space of quasimorphisms and quasi-cocycles on $N$ non-extendable to $G$ . To treat this space, we esta…

math.SG2021★ 2 cited

Commuting symplectomorphisms on a surface and the flux homomorphism

Morimichi Kawasaki, Mitsuaki Kimura, Takahiro Matsushita +1

Let $(S, ω)$ be a closed connected oriented surface whose genus $l$ is at least two equipped with a symplectic form. Then we show the vanishing of the cup product of the fluxes of c…