H. Herrmann

collaborators

2 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

On the second coefficient in the semi-classical expansion of Toeplitz Operators

Chin-Chia Chang, Hendrik Herrmann, Chin-Yu Hsiao

Let $X$ be a compact strictly pseudoconvex embeddable CR manifold and let $A$ be the Toeplitz operator on $X$ associated with a Reeb vector field $\mathcal{T}\in\mathscr{C}^\infty(…