A Prufer Transformation for Matrix Differential Equations
نویسنده
چکیده
Presented to the Society, December, 1955 under the title ^4 necessary condition for nonoscillation of a system of second order differential equations, and August, 1956; received by the editors August 2, 1956. 1 These results were obtained while the author held a National Science Foundation grant, NSF-G1825 and was at Yale University. Now at the University of Utah. 2 This paper contains a bibliography of the use of (2). To this list should be added paper [3] which appeared almost simultaneously with [l].
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