2 papers
math.GT2003
Framings and Projective Framings for 3-Manifolds
Tahl Nowik
We give an elementary proof of the fact that any orientable 3-manifold admits a framing (i.e. is parallelizable) and any non-orientable 3-manifold admits a projective framing. The…
math.GT2003
Immersions of Non-orientable Surfaces
Tahl Nowik
Let F be a closed non-orientable surface. We classify all finite order invariants of immersions of F into R^3, with values in any Abelian group. We show they are all functions of t…