Solid angles and Seifert hypersurfaces

Maciej Borodzik, Supredee Dangskul, Andrew Ranicki

Given a smooth closed oriented manifold $M$ of dimension $n$ embedded in ${\mathbb{R}}^{n+2}$ we study properties of the `solid angle' function $Φ\colon\mathbb{R}^{n+2}\setminus M\to…