The area of analytic varieties in C...
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Lawrence Gruman (1977)
Mathematica Scandinavica
Friedrich Haslinger (2002)
Annales de la Faculté des sciences de Toulouse : Mathématiques
Ryuichi Ishimura, Yasunori Okada (1994)
Bulletin de la Société Mathématique de France
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.
Georg Schneider (2005)
Czechoslovak Mathematical Journal
We consider the solution operator to the -operator restricted to forms with coefficients in . Here denotes -forms with coefficients in , is the corresponding -space and is a suitable rotation-invariant absolutely continuous finite measure. We will develop a general solution formula to . This solution operator will have the property . As an application of the solution formula we will be able to characterize compactness of the solution operator in terms of compactness of commutators...
Walter Rudin (1985)
Annales Polonici Mathematici
Sherstyukov, V.B. (2000)
Siberian Mathematical Journal
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