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arXiv · 1910.05248

Vector bundles of non-negative curvature over cohomogeneity one manifolds

Manuel Amann·David González-Álvaro·Marcus Zibrowius
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Abstract

We provide several results on the existence of metrics of non-negative sectional curvature on vector bundles over certain cohomogeneity one manifolds and homogeneous spaces up to suitable stabilization. Beside explicit constructions of the metrics, this is achieved by identifying equivariant structures upon these vector bundles via a comparison of their equivariant and non-equivariant K-theory. For this, in particular, we transcribe equivariant K-theory to equivariant rational cohomology and investigate surjectivity properties of induced maps in the Borel fibration via rational homotopy theory.

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Manuel Amann, David González-Álvaro, Marcus Zibrowius. 2022-05-06. Vector bundles of non-negative curvature over cohomogeneity one manifolds. https://arxiv.org/abs/1910.05248

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