33 citations · 67 across the 11 of their papers we have counts for
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math.CV2005★ 1 cited
Elliptic CR-manifolds and shear invariant ODE with additional symmetries
Vladimir Ezhov, Gerd Schmalz
We classify the ODEs that correspond to elliptic CR-manifolds with maximal isotropy. It follows that the dimension of the isotropy group of an elliptic CR-manifold can be only 10 (…
math.CV2005★ 33 cited
Canonical Cartan connection and holomorphic invariants on Engel CR manifolds
Valerii Beloshapka, Vladimir Ezhov, Gerd Schmalz
We describe a complete system of invariants for 4-dimensional CR manifolds of CR dimension 1 and codimension 2 with Engel CR distribution by constructing an explicit canonical Cart…