8 research outputs found
Rationality in Differential Algebraic Geometry
Parametric Cartan theory of exterior differential systems, and explicit
cohomology of projective manifolds reveal united rationality features of
differential algebraic geometry.Comment: Abel Symposium 201
Classification of homogeneous CR-manifolds in dimension 4
Locally homogeneous CR-manifolds in dimension 3 were classified, up to local CR-equivalence, by E. Cartan. We classify, up to local CR-equivalence, all locally homogeneous CR-manifolds in dimension 4. The classification theorem enables us also to classify all symmetric CR-manifolds in dimension 4, up to local CR-equivalence