Oscillation of solutions of first-order neutral differential equations
Here, first-order neutral differential equations are studied and sufficient conditions are derived for every solution to be oscillatory. The approach employed here is to reduce the oscillation of neutral differential equations to the nonexistence of positive solutions to nonneutral differential equations. See also \textit{M. K. Grammatikopoulos}, \textit{G. Ladas} and \textit{Y. G. Sficas} [Rad. Mat. 2, 279-303 (1986; Zbl 0617.34067)] and \textit{I. Györi} and \textit{G. Ladas} [Oscillation theory of delay differential equations: with applications. Oxford: Clarendon Press (1991; Zbl 0780.34048)].
first-order neutral differential equations
scientific article; zbMATH DE number 1790844