1997
DOI: 10.1090/s0002-9939-97-03947-6
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Generalized upper and lower solution method for the forced Duffing equation

Abstract: Abstract. This paper gives the generalized upper and lower solution method for the forced Duffing equationand obtains existence theorems for T -periodic solutions, where f is a Carathéo-dory function. Our results generalize or extend some famous results obtained by Mawhin(1985), Habets(1990), Nkashama(1989) and Nieto(1990).

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Cited by 7 publications
(1 citation statement)
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“…As a method to study the characterizes of solutions, the upper and lower approach has been attracted much attention from a lot of researchers for many years, see [3,16,26,27,28] and references therein. Motivated by one of those papers, which establish the monotone methods in nonlinear elliptic and parabolic boundary value problems [27].…”
Section: Introductionmentioning
confidence: 99%
“…As a method to study the characterizes of solutions, the upper and lower approach has been attracted much attention from a lot of researchers for many years, see [3,16,26,27,28] and references therein. Motivated by one of those papers, which establish the monotone methods in nonlinear elliptic and parabolic boundary value problems [27].…”
Section: Introductionmentioning
confidence: 99%