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On the Liouville-type transformation for differential systems. (English) Zbl 0631.34042
The Liouville-type transformation for linear differential systems of the second order $$y''+P(x)y=0$$, where P(x) is a symmetric nonsingular $$n\times n$$ matrix, is established. By means of this transformation the well-known oscillation and asymptotic criteria for scalar differential equations are extended to differential systems.
##### MSC:
 34C10 Oscillation theory, zeros, disconjugacy and comparison theory for ordinary differential equations 34E05 Asymptotic expansions of solutions to ordinary differential equations
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##### References:
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