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    Analytic Solutions of a Second-Order Functional Differential Equation with a State Derivative Dependent Delay

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    We investigate an analytic solution of the second-order differential equation with a state derivative dependent delay of the form x″(z)=x(p(z)+bx′(z)). Considering a convergent power series g(z) of an auxiliary equation γ2g″(γz)g′(z)=[g(γ2z)-p(g(γz))]γg′(γz)(g′(z))2+p′′(g(z))(g′(z))3+γg′(γz)g″(z) with the relation p(z)+bx′(z)=g(γg-1(z)), we obtain an analytic solution x(z). Furthermore, we characterize a polynomial solution when p(z) is a polynomial

    Analytic solutions of a second-order functional differential equation with a state derivative dependent delay

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    This paper is concerned with a second-order functional differential equation of the form x′′(z)=x(az+bx′(z))x''(z)=x(az+bx'(z)) with the distinctive feature that the argument of the unknown function depends on the state derivative. An existence theorem is established for analytic solutions and systematic methods for deriving explicit solutions are also given
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