Infinitely Many Periodic Solutions to Delay Differential Equations via Critical Point Theory
Keyword(s):
By the critical point theory, infinitely many 4σ-periodic solutions are obtained for the system of delay differential equationsẋt=-f(x(t-σ)), whereσ∈(0,+∞)andf∈C(ℝn,ℝn). It is shown that all the periodic solutions derived here are brought about by the time delay.
2005 ◽
Vol 218
(1)
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pp. 15-35
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2015 ◽
Vol 4
(4)
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pp. 251-261
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2009 ◽
Vol 247
(3)
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pp. 822-865
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