It is shown that two Levi–Tanaka and infinitesimal CR automorphism algebras, associated with a totally nondegenerate model of CR dimension one are isomorphic. As a result, the model surfaces are maximally homogeneous and standard. This gives an affirmative answer in CR dimension one to a certain question formulated by Beloshapka.

中文翻译：

---

CR维一中的完全非退化模型和标准流形

结果表明，与一个完全不退化的CR维一模型相关的两个Levi-Tanaka和无限小CR自同构代数是同构的。结果，模型表面最大程度地均匀和标准。这在CR维度一中对Beloshapka提出的某个问题给出了肯定的答案。