Quantification géométrique : théorie et exemples
Quasiconformal equivalence of spherical CR manifolds.
Quasiconformal mappings on the Heisenberg group.
Quaternionic Manifolds.
Quaternionic-like structures on a manifold: Note I. 1-integrability and integrability conditions
This Note will be followed by a Note II in these Rendiconti and successively by a wider and more detailed memoir to appear next. Here six quaternionic-like structures on a manifold (almost quaternionic, hypercomplex, unimodular quaternionic, unimodular hypercomplex, Hermitian quaternionic, Hermitian hypercomplex) are defined and interrelations between them are studied in the framework of general theory of G-structures. Special connections are associated to these structures. 1-integrability and...
Quaternionic-like structures on a manifold: Note II. Automorphism groups and their interrelations
We consider different types of quaternionic-like structures. The interrelations between automorphism groups of the subordinated structures and of some admissible connections are studied. A characterization of automorphisms of a quaternionic structure as some kind of projective transformations is given. General results on harmonicity of an automorphism of some -structure are obtained and applied to the case of an almost Hermitian quaternionic structure. Different noteworthy transformations groups...
Quelques invariants topologiques en géométrie symplectique
Quelques questions de géométrie symplectique
Quelques remarques sur la classe de Maslov-Arnold