most citedFixed point sets of parabolic isometries of CAT(0)-spaces

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math.GR2007

Quasi-homomorphisms on mapping class groups

Mladen Bestvina, Koji Fujiwara

We refine the construction of quasi-homomorphisms on mapping class groups. It is useful to know that there are unbounded quasi-homomorphisms which are bounded when restricted to pa…

math.GR2007★ 7 cited

A characterization of higher rank symmetric spaces via bounded cohomology

Mladen Bestvina, Koji Fujiwara

Let be complete nonpositively curved Riemannian manifold of finite volume whose fundamental group does not contain a finite index subgroup which is a product of infinite gr…

math.GR2005★ 1 cited

JSJ-decompositions of finitely presented groups and complexes of groups

Koji Fujiwara, Panos Papasoglu

A JSJ-splitting of a group over a certain class of subgroups is a graph of groups decomposition of which describes all possible decompositions of as an amalgamated prod…