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Transactions of the American Mathematical Society
Transactions of the American Mathematical Society
ISSN 1088-6850(online) ISSN 0002-9947(print)

Two point boundary problems for second order matrix differential systems


Author: Garret J. Etgen
Journal: Trans. Amer. Math. Soc. 149 (1970), 119-132
MSC: Primary 34.30
MathSciNet review: 0273096
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Abstract: This paper is concerned with second order matrix differential systems involving a parameter together with boundary conditions specified at two points. The object of the paper is to establish sufficient conditions for the existence of eigenvalues for the system. Although such problems have been considered using the results of and techniques from the calculus of variations, the methods and results here are entirely in the context of ordinary differential equations. Use is made of the matrix generalization of the polar coordinate transformation introduced by J. H. Barrett and the unitary transformation suggested by F. V. Atkinson and V. A. Jakubovič. The sufficient conditions for the existence of eigenvalues obtained here represent certain extensions of W. M. Whyburn's work concerning linear and nonlinear boundary problems for second order differential systems.


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DOI: http://dx.doi.org/10.1090/S0002-9947-1970-0273096-3
PII: S 0002-9947(1970)0273096-3
Keywords: Matrix differential equations, second order matrix differential systems, two point boundary problems, existence of eigenvalues, oscillatory behavior
Article copyright: © Copyright 1970 American Mathematical Society