Cohomogeneity one disk bundles with normal homogeneous collars

Abstract

We consider cohomogeneity one homogeneous disk bundles and adress the question when these admit a nonnegatively curved invariant metric with normal collar, i.e., such that near the boundary the metric is the product of an interval and a normal homogeneous space. If such a bundle is not (the quotient of) a trivial bundle, then we show that its rank has to be in $\{2,3,4,6,8\}$. Moreover, we give a complete classification of such bundles of rank 6 and 8, and a partial classification for rank 3.

References in corpus (2)

• Non-negative curvature obstructions in cohomogeneity one and the Kervaire spheres
• Homogeneous Metrics with nonnegative curvature

Cited by in corpus (1)

• Homogeneous Metrics with nonnegative curvature