Abstract
We show that if the Lyapunov exponents of a linear delay equation x′ = L(t)x t are limits, then the same happens with the exponential growth rates of the solutions to the equation x′ = L(t)x t + f(t, x t ) for any sufficiently small perturbation f.
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Barreira, L., Valls, C. A Perron-type theorem for nonautonomous delay equations. centr.eur.j.math. 11, 1283–1295 (2013). https://doi.org/10.2478/s11533-013-0244-6
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DOI: https://doi.org/10.2478/s11533-013-0244-6