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On some analogs of Sturm’s and Kneser’s theorems for nonlinear systems. (English) Zbl 0327.34027

34C10Qualitative theory of oscillations of ODE: zeros, disconjugacy and comparison theory
Full Text: DOI
[1] Bellman, R.: Stability theory of differential equations. (1954) · Zbl 0057.12503
[2] Walter, W.: Differential and integral inequalities. (1970) · Zbl 0252.35005
[3] Izjumova, D. V.: On the conditions of the oscillation and non-oscillation of solutions of a nonlinear second order differential equation. Differencial’nye uravnenija 2, No. 12, 1572-1586 (1966)
[4] Mirzov, J. D.: A remark on the oscillations of solutions of the system of ordinary differential equations. Soobšč. akad. Nauk gruzin. SSR 61, No. 2, 277-279 (1971)
[5] Mirzov, J. D.: On the oscillations of solutions of the system of nonlinear differential equations. Differencial’nye uravnenija 9, No. 3, 581-583 (1973)