A Class of Hypoelliptic Pseudodifferential Operators with Double Characteristics.
Symplectic classification of quadratic forms, and general Mehler formulas.
The Existence of Wave Operators in Scattering Theory.
On the Existence of Real Analytic Solutions of Partial Differential Equations with Constant Coefficients.
On the Uniqueness of the Cauchy Problem II.
A new proof and a generalization of an inequality of Bohr
Lp Estimates for (Pluri-) Subharmonic Functions.
On the Uniqueness of the Cauchy Problem.
Local and global properties of fundamental solutions
Some inequalities for functions of exponential type
Hypoelliptic Convolution Equations.
A remark on singular supports of convolutions.
Asymptotic behavior of Fourier-Laplace transform
Remarks on the Klein-Gordon equation
Remarks on Holmgren's uniqueness theorem
On the Legendre and Laplace transformations
The null space of the -Neumann operator
Let be a complex analytic manifold of dimension with a hermitian metric and boundary, and let be the self-adjoint -Neumann operator on the space of forms of type . If the Levi form of has everywhere at least positive or at least negative eigenvalues, it is well known that has finite dimension and that the range of is the orthogonal complement. In this paper it is proved that dim if the range of is closed and the Levi form of has signature ...
Hypoelliptic differential operators
On donne une condition suffisante pour l’hypoellipticité d’une équation différentielle à coefficients variables. La démonstration utilise une paramétrix construite par transformation de Fourier.
Unicité de la solution du problème de Cauchy pour certains opérateurs elliptiques à coefficients variables (fin)
Unicité de la solution du problème de Cauchy pour certains opérateurs elliptiques à coefficients variables
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