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Liénard方程周期解的存在唯一与唯二性问题 被引量:5

On the Existence of Exactly One and Two Periodic Solutions of Liénard Equation
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摘要 本文考虑微分方程 x+f(x)x+g(x)=p(t),其中g∈C^1(R)为严格递减,f ∈ C(R),p(t)为2π周期的连续函数,给出周期解的存在唯一的充要条件;在f(x)=c,g(x)严格凸函数且跨越第一共振点零时,给出唯二性定理。 In this paper, we consider the Lienard equation +f(x) +g(x) =p(t), where g∈C^1(R), f∈C(R), p(t)∈C_(2π). A necessary and sufficient condition to ensure the existence and uniqueness of a 2π-periodic solution is obtained, for the Duffing type equation. For the Ambrossetti-Prodi type, +c+ g(x,t) =s, the existence of exactly two periodic solutions is confirmed by Sturm theory.
出处 《数学学报(中文版)》 SCIE CSCD 北大核心 2004年第3期417-424,共8页 Acta Mathematica Sinica:Chinese Series
基金 国家重大基础研究专项经费(G1999032801-07) 自然科学基金(50136030) 高校重点实验室访问学者基金
关键词 LIÉNARD方程 周期解 延拓定理 存在唯一性 唯二性 Lienard equation Periodic solution Continuation theorem
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