A simple proof of the Beloshapka theorem on the parametrization of the automorphism group of a CR manifold
The authors give a simpler proof of a theorem of \textit{V. K. Beloshapka} [Math. Notes 47, No. 3, 239-242 (1990); translation from Mat. Zametki 47, No. 3, 17-22 (1990; Zbl 0715.32011)], stating that the automorphisms of a real analytic nondegenerate CR submanifold \(M\) of a complex Euclidean space \(\mathbb C^n\) are completely determined by their first and second derivatives at a point \(0\in M\).
scientific article; zbMATH DE number 1238036