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Periodic solutions for a kind of second order differential equation with multiple deviating arguments. (English) Zbl 1037.34065

Summary: By means of a continuation theorem of coincidence degree theory, some new results on the existence, and nonexistence of periodic solutions for a kind of second-order functional-differential equation with multiple deviating arguments are obtained.

MSC:

34K13 Periodic solutions to functional-differential equations
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