On delay- dependent stability test (criterion) for a retarded delay differential system. – D. K. Igobi, I. E. Egong and C. E. Onwukwe
The stability problem for a class of retarded delay differential systems is considered in this paper. The time delay (h) was assumed a variable and the asymptotic criteria was contrived. Test was formulated in the form of a scalar positive matrix functional and its application to numerical problems confirmed the suitability of this test.