Cauchy problem for quasilinear systems of functional differential equations

Abstract

We use the contracting mapping principle for proving that under some mild restrictions the Cauchy problem for quasilinear systems of functional differential equations with retarded arguments has the unique solution. As a consequence from this result we obtain that the Cauchy problem for linear systems of functional differential equations with locally integrable coeffcients and with locally measurable retarded arguments has the unique solution. We show that similar results can be obtained for the Cauchy co problem of quasilinear systems of functional differential equations with advanced arguments.