الفهرس 
Contents
A Stability Result for the Solutions of a Certain Fourth- order Vector Di erential Equation with DelayOnly 14 pages are availabe for public view
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Abstract
The fundamental challenges of science are those of Description and Prediction, when we are observing certain phenomena, we wish to know how to describe what we see and how to determine subsequent behaviour. Differential equations are an essential tool in the description of the physical phenomena through mathematical models that cover almost any area of human knowledge.