Zobrazeno 1 - 10
of 108
pro vyhledávání: '"Matsuda, Yoshifumi"'
Autor:
Kawasaki, Morimichi, Kimura, Mitsuaki, Kodama, Hiroki, Matsuda, Yoshifumi, Matsushita, Takahiro, Orita, Ryuma
Many transformation groups on manifolds are simple, but their universal coverings are not. In the present paper, we study the concept of relatively simple group, that is, a group with the maximum proper normal subgroup. We show that many examples of
Externí odkaz:
http://arxiv.org/abs/2412.00839
We study rigidity properties of actions of a torsion-free lattice of $\operatorname{PSU}(1,1)$ on the circle $S^1$. We follow the approaches of Frankel and Thurston proposed in preprints via foliated harmonic measures on the suspension bundles. Our m
Externí odkaz:
http://arxiv.org/abs/2207.08411
We show that certain groups of piecewise linear homeomorphims of the interval are invariably generated.
Comment: 10 pages, 1 figure
Comment: 10 pages, 1 figure
Externí odkaz:
http://arxiv.org/abs/1612.06499
Autor:
Matsuda, Yoshifumi
We characterize the semi-conjugacy class of a Fuchsian action of the modular group on the circle in terms of rotation numbers of two standard generators and that of their product. We also show that among lifts of a Fuchsian action of the modular grou
Externí odkaz:
http://arxiv.org/abs/1506.09066
We consider two families of subgroups of a group. Each subgroup which belongs to one family is contained in some subgroup which belongs to the other family. We then discuss relations of relative hyperbolicity for the group with respect to the two fam
Externí odkaz:
http://arxiv.org/abs/1301.4029
We define relatively quasiconvex subgroups of relatively hyperbolic groups in the sense of Osin and show that such subgroups have expected properties. Also we state several definitions equivalent to the definition of relatively hyperbolic groups in t
Externí odkaz:
http://arxiv.org/abs/1301.3201
Autor:
Matsuda, Yoshifumi, Oguni, Shin-ichi
Baker and Riley proved that a free group of rank 3 can be contained in a hyperbolic group as a subgroup for which the Cannon-Thurston map is not well-defined. By using their result, we show that the phenomenon occurs for not only a free group of rank
Externí odkaz:
http://arxiv.org/abs/1206.5868
We consider two compacta with minimal non-elementary convergence actions of a countable group. When there exists an equivariant continuous map from one to the other, we call the first a blow-up of the second and the second a blow-down of the first. W
Externí odkaz:
http://arxiv.org/abs/1201.6104
We show that if a group is not virtually cyclic and is hyperbolic relative to a family of proper subgroups, then it has a hyperbolically embedded subgroup which contains a finitely generated non-abelian free group as a finite index subgroup.
Com
Com
Externí odkaz:
http://arxiv.org/abs/1109.2663
We discuss the notion of the universal relatively hyperbolic structure on a group which is used in order to characterize relatively hyperbolic structures on the group. We also study relations between relatively hyperbolic structures on a group and re
Externí odkaz:
http://arxiv.org/abs/1106.5288