Jan Gregorovivc

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math.CV2025

Defining equations of $7$ -dimensional model CR hypersurfaces

Jan GregoroviÄ, David Sykes

We study CR hypersurfaces in $C^{4}$ that are Levi degenerate with constant rank Levi form, and moreover finitely nondegenerate. Each of these can be described as a deformat…

math.CV2024

Models of $2$ -nondegenerate CR hypersurface in $C^{N}$

Jan GregoroviÄ, Martin KolÃ¡Å, David Sykes

We show that every point in a uniformly $2$ -nondegenerate CR hypersurface is canonically associated with a model $2$ -nondegenerate structure. The $2$ -nondegenerate models are basic…

Defining equations of 7-dimensional model CR hypersurfaces

Models of 2-nondegenerate CR hypersurface in CN

Defining equations of $7$ -dimensional model CR hypersurfaces

Models of $2$ -nondegenerate CR hypersurface in $C^{N}$