Über die Lösbarkeit der ...-Gleichung auf Ringgebieten mit Hilfe von Lp-, Ck- und D'-stetigen Integraloperatoren.
Ueber die Integration simultaner partieller Differentialgleichungen der ersten Ordnung mit derselben unbekannten Function.
Un exemple de domaine pseudoconvexe regulier où l'équation ...u = f n'admet pas de solution bornée pour f bornée.
Un opérateur différentiel dans au comportement surprenant (d’après A. Andreotti et C. D. Hill)
Uniform Estimates for the d-Equation on Domains with Piecewise Smooth Strictly Pseudoconvex Boundaries.
Unique continuation in abstract pseudoconcave manifolds
Universal prolongation of linear partial differential equations on filtered manifolds
The aim of this article is to show that systems of linear partial differential equations on filtered manifolds, which are of weighted finite type, can be canonically rewritten as first order systems of a certain type. This leads immediately to obstructions to the existence of solutions. Moreover, we will deduce that the solution space of such equations is always finite dimensional.