A fake cusp and a fishtail
arXiv:math/9904058
Abstract
We construct smooth 4-manifolds that are homeomorphic but not diffeomorphic to the "cusp" and the "fishtail", which are certain thickened singular 2-spheres.
14 pages, 22 figures
arXiv:math/9904058
We construct smooth 4-manifolds that are homeomorphic but not diffeomorphic to the "cusp" and the "fishtail", which are certain thickened singular 2-spheres.
14 pages, 22 figures