Abstract
A singularly perturbed system of linear differential equations with a small delay is considered. Estimates of blocks of the fundamental matrix solution to this system uniformly valid for all sufficiently small values of the parameter of singular perturbations are obtained in the cases of time-independent and time-dependent coefficients of the system. In the first case the system is considered on an infinite time-interval, while in the second case it is considered on a finite one. These estimates are applied to justify a uniform asymptotic solution of an initial-value problem for this system in both cases.
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