Propagation de singularités pour les opérateurs du type
Calcul pseudodifférentiel trois-étape
Solutions fondamentales exactes
Exact fundamental solutions are known for operators of various types. We indicate a general approach that gives various old and new fundamental solutions for operators with double characteristics. The solutions allow one to read off detailed behavior, such as the presence or absence of analytic hypoellipticity. Recent results for operators with multiple characteristics are also described.
and Hölder estimates for pseudodifferential operators : sufficient conditions
Continuity in spaces and spaces of Hölder type is proved for pseudodifferential operators of order zero, under general conditions on the class of symbols. Applications to the regularity theory of some hypoelliptic operators are outlined.
Estimates on kernels for the ...-equation and the ...-Neumann problem.
Scattering, scattering inverse et équations d'évolutions non linéaires
Metrics and Geodesics Induced by Order Relations.
LP and Lipschitz Estimates for the ... Equation and the ...-Neumann Problem.
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