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The null space of the ¯ -Neumann operator

Lars Hörmander (2004)

Annales de l’institut Fourier

Let Ω be a complex analytic manifold of dimension n with a hermitian metric and C boundary, and let = ¯ ¯ * + ¯ * ¯ be the self-adjoint ¯ -Neumann operator on the space L 0 , q 2 ( Ω ) of forms of type ( 0 , q ) . If the Levi form of Ω has everywhere at least n - q positive or at least q + 1 negative eigenvalues, it is well known that Ker has finite dimension and that the range of is the orthogonal complement. In...

The Oka-Weil theorem in topological vector spaces

Bui Dac Tac (1991)

Annales Polonici Mathematici

It is shown that a sequentially complete topological vector space X with a compact Schauder basis has WSPAP (see Definition 2) if and only if X has a pseudo-homogeneous norm bounded on every compact subset of X.

The overdetermined Cauchy problem

Chiara Boiti, Mauro Nacinovich (1997)

Annales de l'institut Fourier

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.

The pluricomplex Green function on some regular pseudoconvex domains

Gregor Herbort (2014)

Annales Polonici Mathematici

Let D be a smooth bounded pseudoconvex domain in ℂⁿ of finite type. We prove an estimate on the pluricomplex Green function D ( z , w ) of D that gives quantitative information on how fast the Green function vanishes if the pole w approaches the boundary. Also the Hölder continuity of the Green function is discussed.

The Pluripolar Hull and the Fine Topology

Armen Edigarian (2005)

Bulletin of the Polish Academy of Sciences. Mathematics

We show that the projections of the pluripolar hull of the graph of an analytic function in a subdomain of the complex plane are open in the fine topology.

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