2 papers
math.CV2026
Proper maps of annuli
Abdullah Al Helal, Jiri Lebl, Achinta Kumar Nandi
We study proper holomorphic maps of annuli in complex Euclidean spaces, that is, domains with as the automorphism group. By the Hartogs phenomenon and a result of ForstneriÄ…
math.CV2024
Proper maps of ball complements & differences and rational sphere maps
Abdullah Al Helal, JiÅÃ Lebl, Achinta Kumar Nandi
We consider proper holomorphic maps of ball complements and differences in complex euclidean spaces of dimension at least two. Such maps are always rational, which naturally leads…