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Existence and uniqueness of periodic solutions for a kind of first order neutral functional differential equations. (English) Zbl 1101.34054
Summary: We use the coincidence degree theory to establish new results on the existence and uniqueness of \(T\)-periodic solutions for the first-order neutral functional-differential equation \[ (x(t)+Bx(t-\delta))'=g_1(t,x(t))+g_2(t,x(t-\tau))+p(t). \]

MSC:
34K13 Periodic solutions to functional-differential equations
34K40 Neutral functional-differential equations
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