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Zbl 0767.34017
Grace, S.R.
Oscillation theorems for nonlinear differential equations of second order.
(English)
[J] J. Math. Anal. Appl. 171, No.1, 220-241 (1992). ISSN 0022-247X

Oscillation criteria are obtained for nonlinear differential equations of the type (1) $[rg(x)x']'+px'=qf(x)$, where $p$, $q$, $r$ are real-valued continuous functions in a non-negative interval $[t\sb 0,\infty)$, $f$, $g$ are real-valued continuous functions in $(-\infty,\infty)$, $r(t)>0$ in $[t\sb 0,\infty)$, $xf(x)>0$, and $g(x)>0$ for all $x\ne 0$. The theorems generalize several earlier ones of similar type.
[Charles A.Swanson (Vancouver)]
MSC 2000:
*34C10 Qualitative theory of oscillations of ODE: Zeros, etc.

Keywords: oscillation criteria; nonlinear differential equations

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