On 1-regular ordinary differential operators
Grzegorz Łysik (2000)
Annales Polonici Mathematici
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Solutions to singular linear ordinary differential equations with analytic coefficients are found in the form of Laplace type integrals.
Grzegorz Łysik (2000)
Annales Polonici Mathematici
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Solutions to singular linear ordinary differential equations with analytic coefficients are found in the form of Laplace type integrals.
Lowell Schoenfeld (1969)
Acta Arithmetica
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Chiara Boiti, Mauro Nacinovich (1997)
Annales de l'institut Fourier
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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.
Kai-Man Tsang (1986)
Acta Arithmetica
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J. Riddell (1982)
Acta Arithmetica
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Graeme Cohen (1975)
Acta Arithmetica
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R. Miech (1969)
Acta Arithmetica
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L. Koczan, J. Szynal (1983)
Banach Center Publications
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