Oscillation criteria for second-order differential systems

Ahmad, Shair; Travis, C. C.

doi:10.1090/S0002-9939-1978-0486792-2

Oscillation criteria for second-order differential systems
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by Shair Ahmad and C. C. Travis PDF

Proc. Amer. Math. Soc. 71 (1978), 247-252 Request permission

Abstract:

Sufficient conditions for the oscillation of solutions to the differential system $X''(t) + A(t)X(t) = 0$ are established which are valid when the matrix A is not symmetric. An example is given to demonstrate that a condition known to be sufficient for the oscillation of solutions when A is symmetric is not valid in the nonsymmetric case.

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