Periodic solutions of non-linear differential equations of the second order. IV
1951 ◽
Vol 47
(4)
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pp. 741-751
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Keyword(s):
The Real
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1.1. This paper is a theoretical investigation in the real domain of the existence of subharmonic solutions of non-linear differential equations of the formwhere F is analytic and of least period 2π/ω in t; ε = (ε1, …, εn) is small; and F(x, ẋ, 0, t) is not linear in x and ẋ.
1951 ◽
Vol 47
(4)
◽
pp. 752-755
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1951 ◽
Vol s1-26
(3)
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pp. 215-221
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1959 ◽
Vol 38
(1-4)
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pp. 126-129
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1978 ◽
Vol 81
(3-4)
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pp. 195-210
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1968 ◽
Vol 11
(5)
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pp. 743-745
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1965 ◽
Vol 14
(4)
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pp. 257-268
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1972 ◽
Vol 7
(2)
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pp. 207-220
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