Equivalences of 5-dimensional CR manifolds III: Six models and elementary normalizations
arXiv:1311.7522
Abstract
The six nondegeneracy conditions of geometric nature that are satisfied by the only six possibly existing nondegenerate general classes I, II, III-1, III-2, IV-1, IV-2 of 5-dimensional CR manifolds are shown to be readable instantaneously from their elementarily normalized respective defining graphed equations, without advanced Moser theory.
54 pages