DIFFERENTIABLE ACTIONS OF HOMOTOPY SEVEN SPHERES, II.
Abstract
The paper presents a theorem which shows that there are exactly six unoriented homotopy 7-spheres not diffeomorphic to one another such that on each of them there is a free differentiable action of the circle group. Moreover, on any homotopy 7-sphere, if there exists a free differentiable action of the circle group, then there are infinitely many topologically distinct from one another.
Document Details
- Document Type
- Technical Report
- Publication Date
- Mar 04, 1968
- Accession Number
- AD0667377
Entities
People
- C. T. Yang
- D. Montgomery
Organizations
- University of Pennsylvania