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A Hopf global bifurcation theorem for retarded functional differential equations. (English) Zbl 0389.34050

##### MSC:
 34K99 Functional-differential equations (including equations with delayed, advanced or state-dependent argument) 34C25 Periodic solutions to ordinary differential equations 37G99 Local and nonlocal bifurcation theory for dynamical systems 47J05 Equations involving nonlinear operators (general)
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