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Existence results on positive periodic solutions of forced functional difference equations and applications

✍ Scribed by Yuji Liu


Publisher
Elsevier Science
Year
2009
Tongue
English
Weight
189 KB
Volume
33
Category
Article
ISSN
0307-904X

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✍ Yongkun Li; Lifei Zhu; Ping Liu πŸ“‚ Article πŸ“… 2004 πŸ› Elsevier Science 🌐 English βš– 321 KB

## In this paper, we use the upper and lower solutions method to show that there exists a A\*, such that the nonlinear functional difference equation of the form has at least one positive T-periodic solutions for A E (0, A\*] and does not have any positive T-periodic solutions for A > A\*, where a

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✍ Yan Luo; Weibing Wang; Jianhua Shen πŸ“‚ Article πŸ“… 2008 πŸ› Elsevier Science 🌐 English βš– 203 KB

In this work, we deal with a new existence theory for positive periodic solutions for two kinds of neutral functional differential equations by employing the Krasnoselskii fixed-point theorem. Applying our results to various mathematical models we improve some previous results.