On a mixed problem for a constant coefficient second-order system.
On algebraic characterization of coercive linear partial differential operators with constant coefficients
On tensor functions whose gradients have some skew-symmetries
Let be a real inner product space of any dimension; and let be a -map relating any two tensor spaces on . We study the consequences imposed on the form of this function by the condition that its gradient should be skew-symmetric with respect to some pairs of indexes. Any such a condition is written as a system of linear partial differential equations, with constant coefficients, which is symmetric with respect to certain couples of independent variables. The solutions of these systems appear...
On the Functional Dimension of Solution Spaces of Hypoelliptic Partial Differential Operators.
On the functors Ext¹(E,F) for Fréchet spaces
On the "Fundamental Principle" of L. Ehrenpreis
On the Influence of Lower Order Terms for Propagation of Analytic Singularities for Operators with Constant Coefficients.
Overdetermined hyperbolic systems on l.e. convex sets