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Zbl 0898.34062
Diblik, Josef
Positive and oscillating solutions of differential equations with delay in critical case. (English)
[J] J. Comput. Appl. Math. 88, No.1, 185-202 (1998). ISSN 0377-0427

The article is devoted to the existence of positive solutions to nonlinear retarded functional-differential equations. Some criteria of existence and some comparison results are proved. The existence of positive and oscillation solutions to the equation $x'(t)=-a(t)x(t-\tau)$ in the critical case is proved.
[A.Rodkina (Voronezh)]
MSC 2000:
*34K11 Oscillation theory of functional-differential equations
34C15 Nonlinear oscillations of solutions of ODE

Keywords: functional-differential equations; positive solutions; oscillation solutions

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