On Strict Levi q-Convexity and q-Concavity on Domains with Piecewise Smooth Boundaries.
On the absence of Poincaré lemma for some systems of partial differential equations
On boundary Hilbert differential complexes
Overdetermined hyperbolic systems on l.e. convex sets
On weighted estimated for some systems of partial differential operators
The Contribution of A. Andreotti to the Theory of Complexes of p.d.o.'s
Domaines de régularité pour les opérateurs elliptiques à coefficients constants (une fonction inconnue)
Théorie élémentaire de la convexité
Extension of formal power series solutions
The overdetermined Cauchy problem
We consider the (characteristic and non-characteristic) Cauchy problem for a system of constant coefficients partial differential equations with initial data on an affine subspace of arbitrary codimension. We show that evolution is equivalent to the validity of a principle on the complex characteristic variety and we study the relationship of this condition with the one introduced by Hörmander in the case of scalar operators and initial data on a hypersurface.
Analytic convexity
On the envelope of regularity for solutions of homogeneous systems of linear partial differential operators
The Euler characteristic of standard CR manifolds
In questo lavoro si calcola la caratteristica di Eulero delle varietà CR standard.
Aneurysms of pseudoconcave CR manifolds.
Fields of CR meromorphic functions
Non completely solvable systems of complex first order PDEs
A collar neighborhood theorem for a complex manifold
Elementary pseudoconcavity and fields of CR meromorphic functions
The topology of Stein CR manifolds and the Lefschetz theorem
Necessary topological conditions are given for the closed CR embedding of a CR manifold into a Stein manifold or into a complex projective space.
Unique continuation in abstract pseudoconcave manifolds
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