Affiliation:
1. Department of Mathematics , Ariel University , Ariel , Israel
Abstract
Abstract
A version of the Floquet theory for first order
delay differential equations is proposed. Formula of solutions representation is
obtained. On this basis, the stability of first order delay
differential equations is studied. An analogue of the classical integral Lyapunov–Zhukovskii
test of stability is proved. New, in comparison with all known, tests of the
exponential stability are obtained on the basis of the Floquet theory. A possibility to achieve the exponential stability is connected with oscillation of solutions.