B. Lamel

collaborators

3 papers

math.CV2025

Approximation of pseudohermitian structures via embeddings into spheres

Hendrik Herrmann, Chin-Yu Hsiao, Bernhard Lamel

Let $(X, T^{1, 0} X)$ be a compact strictly pseudoconvex CR manifold which is CR embeddable into the complex Euclidean space. We show that $T^{1, 0} X$ can be approximated in $\mathscr{…

math.CV2025

Regularity of infinitesimal automorphisms of involutive structures

Bernhard Lamel, Nicholas Braun Rodrigues

In this paper, we prove that infinitesimal automorphisms of an involutive structure are smooth. For this, we build a regularity theory for sections of vector bundles over an involu…

math.CV2025

A sphericity criterion for strictly pseudoconvex hyper surfaces in $C^{2}$ via invariant curves

Florian Bertrand, Giuseppe Della Sala, Bernhard Lamel

We prove that if every chain on a strictly pseudoconvex hypersurface $M$ in $C^{2}$ coincides with the boundary of a stationary disc, then $M$ is locally spherical.

Approximation of pseudohermitian structures via embeddings into spheres

Regularity of infinitesimal automorphisms of involutive structures

A sphericity criterion for strictly pseudoconvex hyper surfaces in C2 via invariant curves

A sphericity criterion for strictly pseudoconvex hyper surfaces in $C^{2}$ via invariant curves