Topological Aspects of Holomorphic Mappings of Hyperquadrics from ${\mathbb{C}}^2$ to ${\mathbb{C}}^3$

Abstract

Based on the results in [Rei14a] we deduce some topological results concerning holomorphic mappings of Levi-nondegenerate hyperquadrics under biholomorphic equivalence. We study the class $\mathcal{F}$ of so-called nondegenerate and transversal holomorphic mappings sending locally the sphere in ${\mathbb{C}}^2$ to a Levi-nondegenerate hyperquadric in ${\mathbb{C}}^3$, which contains the most interesting mappings. We show that from a topological point of view there is a major difference when the target is the sphere or the hyperquadric with signature $(2,1)$. In the first case $\mathcal{F}$ modulo the group of automorphisms is discrete in contrast to the second case where this property fails to hold. Furthermore we study some basic properties such as freeness and properness of the action of automorphisms fixing a given point on $\mathcal{F}$ to obtain a structural result for a particularly interesting subset of $\mathcal{F}$.

14 pages

References in corpus (1)

• Classification of Holomorphic Mappings of Hyperquadrics from ${\mathbb{C}}^2$ to ${\mathbb{C}}^3$

Cited by in corpus (2)

• Local and infinitesimal rigidity of hypersurface embeddings
• Sufficient and necessary conditions for local rigidity of CR mappings and higher order infinitesimal deformations