COMPARISON THEOREMS IN DELAY DIFFERENTIAL EQUATIONS IN A CRITICAL STATE AND APPLICATIONS
Published online by Cambridge University Press: 19 March 2001
Abstract
First, two comparison theorems are established between the first order delay differential equation
formula here
and two related second order ordinary differential equations in the case when
formula here
Next, by using these comparison theorems some new oscillation and non-oscillation criteria are given for (*) under condition (**). As a consequence, an open problem by Elbert and Stavroulakis is completely solved.
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- Research Article
- Information
- Copyright
- The London Mathematical Society 2001
Footnotes
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