Electron. J. Diff. Eqns., Vol. 2003(2003), No. 92, pp. 1-6.

Linear delay differential equation with a positive and a negative term

Faiz Ahmad

We study a linear delay differential equation with a single positive and a single negative term. We find a necessary condition for the oscillation of all solutions. We also find sufficient conditions for oscillation, which improve the known conditions.

Submitted June 21, 2003. Published September 8, 2003.
Math Subject Classifications: 34K15, 34C10.
Key Words: Delay equation, oscillation, necessary condition, sufficient conditions

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Faiz Ahmad
Department of Mathematics, Faculty of Science
King Abdulaziz University, P. O. Box 80203
Jeddah 21589, Saudi Arabia
Telephone number: 009662-6332195
email: faizmath@hotmail.com
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