In this paper, we study the behavior of solutions of second order delay differential equationwhere p 1 , p 2 , q 1 , q 2 are real numbers, τ is positive real number. A basic theorem on the behavior of solutions is established. As a consequence of this theorem, a stability criterion is obtained.
In this work, we examine the stability behavior of retarded functional differential equations. The asymptotic behavior of solutions and stability of the zero solution are investigated by using a suitable real root for the characteristic equation. Three examples are also given to illustrate our results.
Some new stability results are given for a delay integro-differential equation. A basis theorem on the behavior of solutions of delay integro-differential equations is established. As a consequence of this theorem, a stability criterion is obtained.
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