## Existence of Positive Solution and New Oscillation Criteria for Nonlinear First–order Neutral Delay Differential Equations

- SHYAM SUNDAR SANTRA
- 2016

First order neutral di¤erential equations are studied and su‰cient conditions are derived for every solution to be oscillatory. Our approach is to reduce the oscillation of neutral di¤erential equations to the nonexistence of eventually positive solutions of non-neutral di¤erential inequalities. Our results extend and improve several known results in the… (More)

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