Global invertibility of polynomial mappings and connectedness of preimages of large spheres
Year: 2026
Type: preprint
Abstract: We prove that a polynomial mapping $\mathbb{R}^2 \to \mathbb{R}^2$ with nowhere zero Jacobian determinant is a global diffeomorphism provided the preimage of large circles are connected. In higher dimensions this result fails and we present families of counterexamples. Yet, in dimension $3$ with codimension of Jelonek set greater than one, we prove that if the preimages of large spheres are connected, then the Jelonek set of the mapping is neither homeomorphic to a line nor can have a single end at infinity.
Source: arXiv (Cornell University)
Language: English
Subfield: Geometry and Topology
Field: Mathematics
Domain: Physical Sciences
Open Access status: green
OpenAlex ID: W7223780944