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math.GR2005
Bounded generation of S-arithmetic subgroups of isotropic orthogonal groups over number fields
Igor V. Erovenko, Andrei S. Rapinchuk
Let f be a nondegenerate quadratic form in at least 5 variables over a number field K and let S be a finite set of valuations of K containing all Archimedean ones. We prove that if…
math.GR2004
Boundedly Simple Groups Have Trivial Bounded Cohomology
Igor V. Erovenko
We observe that the singular part of the second bounded cohomology group of boundedly simple groups is trivial.