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On oscillation criteria for forced nonlinear higher order neutral differential equations. (English) Zbl 1099.34060
The authors present sufficient conditions for oscillation of all solutions of nonlinear higher-order neutral differential equations of the form \[ \bigl [y(t)-p(t)y(t-\tau)\bigr ]^{(n)}+\sum _{i=1}^m Q_i(t)G\bigl (y(t-\sigma _i)\bigr)=f(t) \] and \[ \bigl [y(t)-p(t)y(t-\tau)\bigr ]^{(n)}+\sum _{i=1}^m Q_i(t)G\bigl (y(t-\sigma _i)\bigr)=0 \] for several classes of \(G\) and different ranges of \(p(t)\).

34K11 Oscillation theory of functional-differential equations
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