Bounded cohomology and negatively curved manifolds

Details Bounded cohomology and negatively curved manifolds Bounded cohomology and negatively curved manifolds

2011-11-28

arxiv.org/abs/1111.6412v1

Mathematics

Geometric Topology

Scientific paper

We study the bounded fundamental class in the top dimensional bounded cohomology of negatively curved manifolds with infinite volume. We prove that the bounded fundamental class of $M$ vanishes if $M$ is geometrically finite. Furthermore, when $M$ is a $\mathbb{R}$-rank one locally symmetric space, we show that the bounded fundamental class of $M$ vanishes if and only if the Riemannian volume form on $M$ is the differential of a bounded differential form on $M$.

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